Technical SEO Checklist: 6 Steps to Optimize Your Site for SEO & AI Search

Google used to be the only search engine you needed to worry about. But today, a growing list of AI crawlers are all trying to access your site now too — and they don't always play by Google's rules. Some render JavaScript. Some don't. Some are scraping to train a model, while others are fetching your page in real time to answer someone's question right this second. None of that matters, though, if your technical SEO foundation is shaky.

An estimated 96% of websites fail at least one Core Web Vitals assessment, and 52% of sites have broken internal or external links. If your site falls into either camp, you’re leaving rankings (and AI citations) on the table.

In this technical SEO guide, we’ll walk through a 6-step checklist covering all the technical SEO elements you need to get your site firing on all cylinders. Plus, we’ll share some of our top technical SEO tips.

Key Takeaways

• Crawlability and indexing come first. If a page can't be found or saved, nothing else on this checklist matters.
• Core Web Vitals failures are the norm, not the exception — 96% of sites fail at least one assessment.
• AI bots don't play by Google's rules: most don't render JavaScript at all, many ignore canonical tags and noindex, and robots.txt is currently the only reliable way to control their access.
• Site structure, speed, and clean indexing now double as AI citation signals — not just ranking factors.
• Technical SEO isn't a one-time fix. Build a recurring audit cadence (weekly, monthly, quarterly) to keep pace with new issues.

What is Technical SEO?

Technical SEO is the practice of optimizing your website's infrastructure (i.e. crawlability, indexing, site speed, structure, and rendering) so search engines and AI systems can access, understand, and serve your content.

Technical SEO gets lumped in with its two counterparts: on-page and off-page SEO. However, they're not the same thing:

• On-page SEO is about content and keywords (what you say).
• Off-page SEO is about links and authority (who vouches for you).
• Technical SEO is about infrastructure and whether anyone (human, bot, or AI) can actually reach what you said in the first place.

You can write the best content in your industry and earn links from every major publication in your space, and none of it matters if your site can't be crawled, rendered, or indexed properly. In other words, technical SEO is the foundation everything else gets built on.

Why is Technical SEO Important for AI Search?

AI bots now account for roughly 40–50% of Googlebot-level activity across the web. That's real people, right now, asking ChatGPT, Claude, or Perplexity a question and the bot going out to research the answer on their behalf. If your site isn't technically built to be found, parsed, and trusted in that moment, you don't get a second chance.

As AI systems like AI Overviews, ChatGPT, and Perplexity reshape how people search, organizations now need to focus on AEO and GEO alongside traditional SEO — and technical SEO is at the heart of all three.

None of these AI-powered search engines writes their answers from scratch. They quickly retrieve and synthesize from sources they can parse. So, if your site is poorly structured, slow, or riddled with crawl errors, you have little to no chance of being one of those sources, no matter how good your content is.

And the opportunity cost of being shut out keeps growing. 50% of consumers are already using AI-powered search, with $750B in consumer spend projected to flow through it by 2028. That shift shows up at the query level, too: 18.57% of commercial search queries, 13.94% of transactional queries, and 10.33% of navigational queries currently trigger an AI Overview.

Technical SEO optimization impacts your AI visibility by:

• Determining crawlability: If AI crawlers can’t access your pages, they won’t be able to cite them.
• Enabling structured data: Schema markup helps AI systems understand the meaning of your content.
• Affecting page speed and rendering: JavaScript-heavy pages that render slowly may never make it into an AI system’s index in the first place.
• Signaling content quality: Clean architecture, proper indexing, and fast load times are quality signals AI systems use to decide what’s worth citing.

Not all AI bots behave the same way, so keep these in mind and how they work:

• Training bots crawl broadly to build a model's knowledge and don't care much how deep a page is buried.
• Search/retrieval bots fetch fresh content to answer a specific query and behave more like Googlebot, dropping off quickly past two or three clicks from your homepage.
• User-triggered bots fire in real time when someone asks ChatGPT, Claude, or Perplexity a question — these are the closest thing to an "impression" in AI search, and they're what actually determines whether you show up in an answer.

A site can be heavily crawled by training and search bots and still be invisible in AI-generated answers, because boosting brand visibility in AI search comes down to speed, structure, and content quality, not crawl volume alone.

Ready to get started? Here’s your technical SEO checklist for traditional search engines and AI crawlers:

1. Identify Crawling, Indexing & Crawl Budget Issues

This is the starting point of any technical SEO audit, for one simple reason: if search engines can’t find and save your pages on your site, your beautifully optimized content, flawless schema markup, and other targeted improvements will never be seen. Crawlability and indexing are the gatekeepers.

Check if your pages are being indexed

If Google hasn’t indexed a page, that page might as well not exist. No amount of great content rewrites that rule, so checking if your pages have been indexed should be your first move. You can:

• Pull up the Pages report in Google Search Console to get a full breakdown of what has been indexed versus excluded and why.
• Flag “Crawled - currently not indexed” pages first, since this status is Google telling you it has quality concerns, not a technical block.
• Scan for “Blocked by robots.txt” to catch pages that are being shut out accidentally.
• Look for “Excluded by noindex tag,” which can be intentional or a mistake.
• Use the “Validate Fix” button in Google Search Console after making your corrections.

Look for duplicate versions of your site

Here’s a common authority-killer: http://domain.com, https://domain.com, http://www.domain.com, and https://www.domain.com can all be treated as four different sites by search engines. The result is a classic case of self-sabotage: indexation confusion, diluted authority, and your ranking power split four ways. And this isn’t some rare edge case — 27% of websites have both HTTP and HTTPS versions accessible at the same time.

But don’t panic. The fix is refreshingly simple. Just test each URL variation in your browser to see which versions are still live. Next, 301 redirect every non-preferred URL to a single canonical URL. Our vote goes to HTTPS.

Confirm your robots.txt is properly configured

Your robots.txt file is basically your site’s bouncer list. It’s a tiny text file living at yourdomain.com/robots.txt that tells crawlers exactly where they’re welcome and where they should avoid.

Most of the time, it goes about its business without causing a single problem. But every so often, someone writes one wrong Disallow line, and suddenly your robots.txt is preventing your entire site from being crawled.

While this doesn’t happen that often, when it does, it’s a major issue. You can:

• Pull up your robots.txt file at yourdomain.com/robots.txt and read it, line by line.
• Check every Disallow directive and make sure no important folders or pages were accidentally blocked.
• Run it through Google Search Console’s robots.txt tester for testing.

Robots.txt is also the one file AI crawlers actually pay attention to. Unlike canonical tags or meta noindex, platforms like ChatGPT, Claude, Perplexity, and Gemini follow robots.txt directives. If you want to control AI access to your content, this is where you do it — by name, using each platform's user-agent token:

• GPTBot and ChatGPT-User (OpenAI)
• ClaudeBot (Anthropic)
• PerplexityBot
• Google-Extended (Google's AI training, separate from Googlebot)

You can allow or block each independently, depending on whether you want your content used for training, live retrieval, or both. One thing you may have heard of: llms.txt. Despite the buzz, none of the major AI platforms currently read or act on it. The general industry consensus is this: having an llms.txt file won’t hurt you, but don’t waste a ton of time making one.

Review and optimize your XML sitemap

Your XML sitemap is the roadmap you hand to search engines. It should only list the pages you want them to visit and index, nothing more. An outdated or bloated sitemap looks messy and wastes crawl budget on pages that don’t deserve it.

Follow these technical SEO best practices for your sitemap:

• Confirm your sitemap is submitted in Google Search Console, since an unsubmitted sitemap doesn’t do you any good sitting unused.
• Remove redirect URLs, 404s, and noindexed pages from the sitemap that may have snuck in.
• Keep your sitemap updated as you publish new content, so it never falls out of sync with what’s live.

Ensure important pages are crawlable

Here’s a fun distinction: a page can be invisible to search engines either because it has been actively blocked (by robots.txt or noindex), or because it simply never got discovered.

Both problems look identical from the outside, but they need very different fixes. You can:

• Run GSC’s URL Inspection tool on any page you're unsure about to see exactly what Google sees when it looks at that URL.
• Map out how many clicks a page is from your homepage.
• Flag anything buried more than 3–4 clicks deep, since pages that are tucked away get crawled rarely, even when nothing is technically stopping them.

Optimize your crawl budget

Crawl budget is Googlebot’s attention span for your site: a finite number of pages it’s willing to crawl in a given window.

If you run a small site with clean architecture, congratulations. You probably won’t run into too much trouble with your crawl budget. If you’re running a large or constantly-changing site, this is suddenly very much your problem. You can preserve your crawl budget by:

• Blocking low-value pages via robots.txt, such as faceted navigation, session ID URLs, and internal search result pages.
• Noindexing thin or purely functional pages so they stop hogging attention that should go to more important pages.
• Finding and eliminating duplicate URLs, since every duplicate is crawl budget burned on a page Google’s already seen.

Resolve redirect chains and loops

A redirect chain is when URL A sends you to URL B, which sends you to URL C, instead of just taking you straight to C. A redirect loop is even worse. It’s when URL A sends you to URL B, which sends you… back to URL. It’s an infinite loop.

Bot redirect chains and redirect loops waste crawl budget, dilute link equity, and result in slow page loads for users — and about 12% of websites have one (or more) lurking somewhere.

To avoid any pesky redirects, you should:

• Crawl your site to find every chain and loop.
• Trace each one back to its true final destination.
• Update the link or redirect to point there directly, skipping the back-and-forth and saving crawl budget in the process.

Fix broken links across your site

A broken link is a tiny but impactful betrayal. It promises a destination and then dumps the user (or the crawler) straight into a 404 wall. Not only does it hurt the user experience, but it also tells search engines your site isn’t being maintained.

And it’s shockingly common. 52% of websites have broken internal or external links somewhere in the mix. To avoid being a part of that statistic, you can:

• Bring the page back if it still matters and was removed by accident.
• 301 redirect to the next-best relevant page if the original is truly gone for good.
• Cut the link loose if there’s nothing reasonable to redirect it to.
• Swap out or remove any broken external links the moment you spot them.

It’s also a good idea to schedule recurring crawls. You’ll be able to catch new broken links before they have a chance to multiply, which they absolutely will do if left unchecked, especially on a large site or one that publishes constantly.

Address server-side errors

5xx errors (server errors) are the ultimate crawl dealbreaker. They don’t just hurt your chances. They stop crawling and indexing altogether. About 10% of websites deal with these regularly, including:

• 500 errors: These are the generic server errors. A.K.A. Something broke, and we're not totally sure what.
• 502 errors: Bad gateway errors mean a server playing middleman got handed an invalid response.
• 503 errors: If there’s a 503 error, it means the server is either overwhelmed or down for maintenance.
• 504 errors: Gateway timeout errors mean one server got tired of waiting on another and gave up.

You can check for any of these 5xx errors in your site audit tool and then pass them straight to your developer or hosting provider.

2. Improve Site Performance & User Experience

Google’s ranking systems are built to reward great user experiences. Speed, stability, and usability aren't just nice-to-haves — they're ranking signals.

Here are some technical SEO basics you can follow to ensure better site performance and UX:

Ensure your site is fully mobile-friendly

Google uses mobile-first indexing, which means the mobile version of your site is what actually gets crawled and ranked. Yes, even for desktop searches.

That’s why you’ll want to test mobile-friendliness via Google Search Console’s Mobile Usability Report or PageSpeed Insights. But what exactly are you looking for? The basics:

• Responsive design
• Font sizes you don’t have to zoom in to read
• Buttons with enough space that you're not accidentally clicking the wrong link
• Zero horizontal scroll

Enhance Core Web Vitals performance

This is the big one. So, if you can only fix one thing on this list, fix this.

Core Web Vitals are Google’s official ranking factor for user experience, and they come down to three metrics:

Essentially, Google wants your page to load fast, respond instantly, and stay visually appealing while it does both. Miss the mark on any one of these, and you’re risking your ranking, since Core Web Vitals are baked directly into how Google evaluates page experience.

A staggering 96% of websites fail at least one Core Web Vitals assessment. That means the odds are, at minimum, decent that one of your own pages has a problem. The good news is that this is one of the most measurable, diagnosable issues on this entire checklist. You can get ahead of the game by:

• Checking your overall scores in GSC’s Core Web Vitals report, which breaks down performance across your whole site rather than just one page at a time.
• Diagnosing individual pages in PageSpeed Insights (the GSC report tells you something’s wrong, while PageSpeed Insights tells you why).
• Prioritizing your highest-traffic pages first. Fixing Core Web Vitals issues on your homepage or top landing pages will have a bigger impact than polishing a page that gets zero traffic.

Improve page speed and server response time

Page speed isn’t just about user experience. It also affects how efficiently search engines crawl your site. The key metric here is TTFB (Time to First Byte), which measures how quickly your server starts responding to a request. Aim for under 200ms.

AI bots are even less patient than Googlebot. Early data on AI crawler behavior suggests that while AI search bots will crawl pages regardless of speed, the bots that actually power live answers favor noticeably faster pages when deciding what to cite — sites loading in well under a second see meaningfully more of that traffic.

Common causes of slow TTFB include:

• Cheap hosting: Budget or shared hosting plans mean your site is sharing server resources with potentially hundreds of other sites, which can drag down response times for everyone on that server, including you.
• No CDN: Without a content delivery network (CDN), every single request has to travel all the way back to your origin server, no matter how far away the visitor actually is. A CDN solves this by caching your content closer to the user.
• Unoptimized server config: Outdated software, missing caching rules, or a database that hasn’t been tuned in a while can all add delay before your server even starts sending data back.

The good part is that you don’t have to guess where the slowdown lives. Run your site through PageSpeed Insights, GTmetrix, or WebPageTest, and each will break down exactly where time is being lost, whether that’s hosting, missing CDN coverage, or a server-side bottleneck. This way, you’ll know exactly where to focus first and can improve your site quickly.

Minimize render-blocking resources (JS/CSS)

Render-blocking resources are the reason a page can have a snappy server and still feel sluggish to load. The browser refuses to display anything until certain JavaScript and CSS files finish loading completely, even if the rest of the page is ready.

A few targeted fixes usually solve this:

• Defer non-critical JS to get it out of the way of initial page load.
• Async load scripts where appropriate so the browser isn’t forced to stop and wait.
• Inline critical CSS so the visible part of the page renders without delay.
• Move non-essential scripts to the bottom of the page so they load last, not first.

Optimize images and reduce page weight

If your LCP score is bad, there’s a good chance an oversized image is the reason why. Images are one of the most common — and most fixable — causes of slow load times across the web, which means this is also one of the easiest wins on this entire checklist. You can:

• Compress images before upload using tools like Squoosh or TinyPNG to shrink file size without noticeably hurting quality.
• Convert to next-gen formats like WebP or AVIF, which deliver the same visual quality at a fraction of the file size of older formats like JPEG or PNG.
• Add proper width and height attributes to prevent layout shift and improve CLS.
• Implement lazy loading for below-the-fold images so the browser only loads what’s actually visible, instead of front-loading every image on the page at once.

And don’t stop at optimizing images. Page weight includes everything your page asks a browser to download, and third-party scripts are often the quiet offenders nobody thinks to check. Audit your site for unused tracking pixels, widgets, or embeds, and remove anything that isn’t actively earning its place.

Remove intrusive pop-ups and interstitials

Mobile users have an official rule working in their favor here: Google penalizes pages that run large interstitials blocking content, no exceptions. So before that pop-up your marketing team’s excited about goes live, it’s worth knowing exactly where the line sits.

The practical rule of thumb: if you're running a pop-up, keep it dismissible, keep it small, and don't let it interrupt someone the second they land. Let them actually see the page before you ask for anything.

3. Strengthen Site Structure, URLs & Navigation

Site structure is how you organize and connect the pages on your site — and it’s doing double duty. Not only does it affect how users navigate your site, but it also impacts how search engines distribute authority across it.

Get it right, and crawling becomes efficient. Plus, everyone, human or bot, stays on the right track. Get it wrong, and even great content can end up stranded somewhere nobody finds it.

To make your site structure as logical and easy to navigate as possible:

Optimize your overall site architecture

The ideal site architecture looks like a pyramid: homepage at the top, category pages below that, then sub-categories, then individual pages at the base. Every important page should be reachable within 3-4 clicks from the homepage, because the deeper a page is buried, the less frequently it gets crawled and the less link equity it receives. This problem compounds fast on large or enterprise sites with thousands of pages competing for attention.

Use clean, SEO-friendly URL structures

URLs should be readable, descriptive, and consistent, not a string of characters only your CMS understands. Here’s what to do and what not to do:

Implement canonical tags correctly

Canonical tags tell search engines which version of a page is the “official” one. They’re essential for sidestepping duplicate content issues caused by URL variations, such as sorting parameters or tracking codes.

Follow these canonical tag rules:

• Every page needs a self-referencing canonical
• Canonical tags should point to the indexable version of a page
• Canonical strategy should stay consistent with your 301 redirects

But there’s one caveat. A canonical tag is a hint, not a directive. Google can choose to ignore it. AI crawlers take that even further. Many disregard canonical tags and noindex directives altogether. A page you've successfully hidden from Google through canonicalization or noindex can still be crawled, read, and cited by an AI bot if anything on your site links to it. If there's content you genuinely don't want surfaced anywhere, robots.txt is currently the only mechanism that reliably blocks AI bots — canonical and noindex won't do it.

Build strong internal linking between pages

Every internal link is a small vote of confidence, passing authority from one page to another while helping search engines find content they might not find otherwise. To build strong internal linking, you can:

• Use descriptive anchor text that goes beyond “click here” (pro-tip: use target keywords as anchor text when possible)
• Link from high-authority pages to important pages that need a search engine ranking boost
• Use a hub-and-spoke content model for topical clusters
• Add “related posts” or contextual links within body content

Just be careful not to overdo it. Having too many links on a page dilutes their value and makes it look spammy.

Implement breadcrumb navigation

Breadcrumbs are the trail at the top of a page showing exactly where you are in the site hierarchy. Think Home > Blog > Technical SEO.

They make navigation easier for users and open the door to breadcrumb-rich results in search. Large, multi-tiered sites benefit the most, especially eCommerce. Just remember to mark them up with BreadcrumbList schema, or the rich result benefit won’t kick in.

Find and fix orphaned pages

Orphaned pages are pages with zero incoming internal links, which makes them nearly impossible for users or search engines to find. 69% of websites have at least one hiding somewhere, often left over from a site migration or content cleanup that never got fully audited.

A site audit tool will uncover them, and fixing them just means adding a few contextual links from relevant pages.

4. Cover Core Technical SEO Foundations

Think of this section as the hygiene layer of technical SEO, or the non-negotiable standards every site needs to meet before anything else is worth optimizing. If you skip these, the more advanced fixes on this technical SEO checklist won’t matter much.

Secure your site with HTTPS

HTTPS encrypts the connection between a user’s browser and server to protect the data passing between them. Google has used HTTPS as a ranking signal since 2014, meaning it’s a tried-and-true method of building trust with both search engines and the people actually visiting your site, but plenty of sites still haven’t made the switch.

Practically speaking, a site still running on plain HTTP gets a “Not Secure” warning, which immediately tanks trust and increases bounce rate before anyone even reads a word of your content. But there’s good news: SSL certificates are often free through hosting providers. If your site isn’t secured yet, let your developer know ASAP.

Ensure consistent HTTP → HTTPS redirects

Having HTTPS isn’t enough on its own if the old HTTP version of your site is still accessible. Both versions end up live at the same time, splitting your authority right down the middle. The fix is a single, blanket, site-wide redirect: 301 redirect every HTTP URL to its HTTPS equivalent, and handle the www/non-www variant at the same time while you're at it.

Set up hreflang for international content

If your site targets only one language and region, skip this entirely. But if you’re running multiple language or regional versions of your content, hreflang tags are what tell search engines which version belongs in front of which audience. It’s what allows the right page to show up in the right country’s search results.

The tags live in the <head> of each page, and you'll need an x-default fallback tag for visitors who don’t match any of the specific versions you’ve set up. Also, don’t forget your reciprocal tags. Every page in the set needs to reference all the others, not just point in one direction.

Here’s a simplified three-language version:

<link rel="alternate" hreflang="en-us" href="https://example.com/en-us/" />

<link rel="alternate" hreflang="de-de" href="https://example.com/de-de/" />

<link rel="alternate" hreflang="x-default" href="https://example.com/" />

Add structured data (schema markup)

Schema markup is code that helps search engines understand what your content means, not just what it literally says on the page. While it’s not a direct search engine ranking factor, it unlocks rich results in the SERPs — things like star ratings, FAQ dropdowns, product details, and event listings — which can meaningfully improve your click-through rate.

Common schema types include:

• Organization
• Article
• Product
• FAQ
• Review
• Event
• Recipe
• BreadcrumbList

Beyond rich results, well-structured content — clear headings, direct Q&A formatting, FAQ schema — is also what makes a page easy for an AI system to extract and quote. The same structure that earns a star rating in Google can earn you a citation in an AI-generated answer. You can use Google’s Schema Markup Generator to build the code and then validate it with Google’s Rich Results Test before you push anything live.

If your business serves a specific area, local schema types like LocalBusiness, PostalAddress, and GeoCoordinates are especially important. See our guide to local SEO for a full breakdown.

Ensure JavaScript content is crawlable and renderable

Googlebot does render JavaScript, but not on the first pass. It comes back later for a second look, and that delay introduces opportunities for things to go wrong. For example, if your crawl budget runs out before that second wave happens, JS-rendered content might get indexed late, or not at all.

AI crawlers are far less forgiving here than Googlebot. Googlebot eventually renders JavaScript on its second pass — AI bots generally don't render it at all. If your titles, body copy, internal links, or structured data only appear after JavaScript executes, they're not "indexed late" for ChatGPT, Claude, or Perplexity — they simply don't exist as far as those crawlers are concerned. That makes server-side rendering or static generation less of a nice-to-have and more of a hard requirement if AI visibility matters to you.

If your important text, links, or structured data only appear after JS executes, you should:

• Use Google Search Console’s URL Inspection tool to check what Google actually sees when it renders a page.
• Rely on server-side rendering (SSR) or static generation for critical content, such as navigation, body copy, and headings.

5. Fix Content-Level Technical Issues

Content and technical SEO might feel like two separate worlds, but the issues in this section live right at the intersection of both. They’re rooted in content decisions, yet they carry real technical consequences for crawl efficiency, indexation, and rankings.

To make sure your content is pulling its weight instead of working against you, you should:

Eliminate duplicate content issues

Duplicate content is exactly what it sounds like: pages that are identical or nearly identical to others, either on your own site or scattered across someone else’s. Why does it matter? Because search engines will struggle to figure out which version actually deserves to rank, and they often pick the wrong one, or suppress both entirely.

Plus, it’s more common than you’d expect. 41% of sites have internal duplicate content issues. Common culprits include:

• URL variations with parameters
• Printer-friendly pages
• Session IDs
• Paginated pages
• Content syndication

The exact fix depends on the cause, but usually adding canonical tags to point to the preferred version, implementing 301 redirects to consolidate duplicates, or using noindex for utility pages that serve a purpose but shouldn’t rank will do the trick.

Improve or expand thin content

Thin content isn’t just a word count problem, though that can sometimes be part of it. What it really comes down to is value. That’s why a 2,000-word page of filler is thin, while a 400-word page that directly answers a question isn’t.

Google tends to flag content that exists primarily to rank rather than help. Common examples include:

• Auto-generated content that offers little original insight or expertise.
• Scraped or copied content pulled from other websites without adding anything new.
• Near-identical category pages or location pages with only a few words changed and no meaningful unique content.
• Doorway pages, or pages created solely to rank for specific keywords and funnel visitors to the same destination.

If your site contains any of these, it may struggle to perform in search results, regardless of how much content you publish. The good news is that thin content can often be transformed into something valuable. Start by identifying pages that aren’t serving users well. Then:

• Rewrite them with original insights, expertise, and useful information.
• Combine multiple weak pages into one comprehensive resource.
• Remove pages that no longer serve a purpose and implement a 301 redirect to the most relevant alternative.

eCommerce websites are particularly prone to thin content because of templated product descriptions, manufacturer copy, and large numbers of similar product pages. Adding unique product details, buying guidance, FAQs, comparison information, and customer-focused content can help turn these pages into assets that both users and search engines value.

Make sure every page has optimized metadata

Metadata may live behind the scenes, but it plays a major role in how your pages perform in search results. Your title tag and meta description are often the first things potential visitors see, influencing both search engine rankings and click-through rates.

Think of metadata as your page’s storefront in Google. A compelling title helps search engines understand what your page is about, while a well-written meta description gives searchers a reason to click.

70% of websites are missing meta descriptions, and 10% are missing title tags, so if you have both already in pretty good shape. Still, there’s always room for improvement, so be sure to follow these metadata best practices:

Audit status codes for internal and outbound links

Every link on your website, whether it points to another page on your site or an external resource, returns an HTTP status code. Most visitors will never see these codes, but search engines do, and they can significantly impact crawlability, user experience, and SEO performance.

While a few redirects here and there aren’t a problem, too many broken links, redirect chains, or server errors can create friction for both users and search engines. That’s why regular link audits should be part of your technical SEO best practices.

Status codes that matter most include:

• 200 means everything is okay and the page is working as expected.
• 301 is a permanent redirect. Just be sure to update the link to point directly to the final URL where possible.
• 302 is for a temporary redirect. Use this one cautiously, as it doesn’t pass full equity.
• 404 means not found, so you’ll need to fix the broken link or redirect the URL to a different page.
• 410 is for an intentionally removed page. For example, if the content is no longer needed.
• 5xx status codes signal server errors and are critical. You should investigate and resolve them as quickly as possible.

Since external websites change over time, pages get removed, and redirects are added without warning, we recommend auditing outbound links at least once per quarter.

6. Monitor, Track & Maintain Technical Health

Don’t treat technical SEO like a one-time project. Instead, consider it ongoing website maintenance. Because even if you work through every item on this technical SEO checklist today, new issues can appear tomorrow.

CMS updates, site redesigns, plugin changes, new content, and third-party scripts can introduce technical issues that affect rankings and visibility. By regularly monitoring and tracking your site’s technical health, you can protect all the work you’ve put into improving your website.

Verify analytics and tracking are working correctly

You can’t improve what you can’t measure, and when analytics break, you lose visibility into what’s actually happening on your site.

To make sure everything is working as it should, you can:

• Confirm GA4 (or equivalent) fires on all pages.
• Check for duplicate tracking inflating session data.
• Verify that tracking survives site migrations and redesigns.
• Confirm key conversion events are properly configured.

Set up and monitor Google Search Console

If technical SEO had a command center, it would be Google Search Console. It’s Google’s direct line of communication with your website and tells you how Google crawls, indexes, and evaluates your content. Plus, it’s free!

To get started, you’ll want to:

• Verify all property variations (HTTP, HTTPS, www, and non-www).
• Submit your XML sitemap.
• Confirm Google can access your most important pages.

Once setup is complete, regularly monitor these reports:

It’s also worth enabling email notifications, so you know when significant crawl or indexing issues appear. Google Search Console (GSC) primarily reports on Google's crawlers and indexing systems. It does not provide visibility into whether third-party AI crawlers such as GPTBot, ClaudeBot, or PerplexityBot are accessing your site.

Track indexing and performance over time

Technical SEO issues often reveal themselves gradually. A sudden drop in indexed pages, impressions, or organic traffic is frequently the first sign that something has gone wrong behind the scenes. Catching those warning signs early can prevent a small issue from becoming a major traffic loss.

Build a simple monitoring process by:

• Reviewing Index Coverage reports weekly for new errors.
• Checking Performance reports monthly for unexpected traffic or visibility declines.
• Refreshing content older than a year, since AI systems consistently cite older content less often regardless of how authoritative it once was.
• Monitoring Core Web Vitals after deployments or major website changes.
• Keeping an eye on crawl statistics and indexing trends over time.

To make things easier on yourself, annotate major changes in GA4, including site updates, migrations, redesigns, and algorithm updates. When traffic or rankings shift, you’ll have a much clearer picture of what changed and when.

Run regular technical SEO audits 

A consistent SEO technical audit schedule catches small issues before they compound into bigger ones. Consider building these into your routine:

• Weekly: Run an automated crawl to catch broken links, redirect issues, and any new crawl errors before they pile up.
• Monthly: Review your GSC reports, check Core Web Vitals, and monitor index coverage for anything that has slipped.
• Quarterly: Run a full SEO technical audit using Semrush Site Audit, Screaming Frog, or Ahrefs, and revisit every item on this checklist from top to bottom.

If you’re running a large or frequently updated site, eCommerce, news, or anything publishing on a near-daily basis, automate as much of this as you possibly can. Manual checks simply won’t be able to keep up, letting issues slip through.

Master Your Technical SEO with Terra

A technical SEO checklist this long can feel like a lot, because to be honest, it is a lot. Crawlability, Core Web Vitals, site architecture, schema markup, ongoing monitoring… The list goes on. Keeping up is a full-time job, and that’s before you even get to content or backlinks.

If reading this technical SEO checklist made you want to hand it off to someone who does this for a living, that’s exactly what we’re here for. Terra’s SEO services cover the full range of technical SEO, so you can focus on running your business instead of chasing robots.txt errors.

Ready to have a trusted partner in everything SEO and beyond? Become a client today.

Technical SEO FAQs

Here are a few quick answers to the questions people ask about technical SEO.

What is technical SEO?

Technical SEO is the practice of optimizing the backend and infrastructure of a website, things like crawlability, indexing, site speed, structured data, and security, so that search engines (and increasingly, AI systems) can access, understand, and rank its content. It’s different from on-page SEO, which focuses on content and keywords, and off-page SEO, which focuses on backlinks and external authority. Technical SEO is the foundation that makes those other efforts possible in the first place.

What are the steps to performing a technical SEO audit?

When learning how to conduct a technical SEO site audit, keep in mind that it generally follows the same structure as this checklist: start by identifying crawling, indexing, and crawl budget issues, then move to site performance and user experience, and finally to site structure and navigation. From there, confirm your core technical foundations are in place, fix any content-level technical issues, and finish by setting up ongoing monitoring so new issues get caught early. Running through this process doesn’t have to be a DIY effort, either. Plenty of sites choose to work with an SEO agency to handle audits on an ongoing basis.

What tools can I use to run a technical SEO audit?

Google Search Console is the essential free starting point for any technical SEO audit, giving you direct insight into indexing, crawl errors, and Core Web Vitals. PageSpeed Insights, GTmetrix, and WebPageTest are useful for diagnosing page speed issues, while tools like Screaming Frog, Semrush Site Audit, and Ahrefs offer more comprehensive, large-scale crawls for bigger sites. Many teams also lean on AI-powered marketing tools to help analyze audit data and prioritize fixes more efficiently.

How does technical SEO help boost visibility in AI search?

AI-powered search engines and answer engines retrieve and synthesize information from sources they can actually crawl, parse, and trust. Strong technical SEO, clean indexing, fast load times, structured data, and crawlable JavaScript directly determine whether your content is even eligible to be one of those sources. Without it, even genuinely excellent content can get passed over simply because the systems generating AI answers couldn’t access or understand it well enough to cite it. Learn more about how to boost brand visibility in AI search.