What Makes an SEO Audit “Technical”?
If you want to know how to do an SEO audit properly, start with one distinction. Separate the technical side from the content side. A technical SEO audit examines whether search engines can crawl, render and index your pages. It does this long before anyone judges your writing or your backlinks. Consequently, it sits underneath every other SEO effort you make.
Think of it this way: brilliant content on a page that Google can’t crawl is invisible. That’s why a technical SEO audit checklist always starts with the plumbing, not the prose. Once the plumbing works, your content and links get a fair chance to rank.
This guide walks through eight practical steps for how to do an SEO audit from start to finish. Each step includes a short checklist you can tick off as you go. Run it yourself, or hand it to whoever manages your site.
Tools You’ll Need First
Before diving into the steps, gather a handful of tools. You don’t need an expensive stack, just the right combination.
- Google Search Console, for indexing and crawl data straight from Google
- A crawler such as Screaming Frog or Sitebulb, to map your entire site structure
- Google’s PageSpeed Insights, for Core Web Vitals data
- RankTomorrow, our free tool that scores technical health, schema and AI visibility in one report
- A staging environment, so you can test fixes before pushing them live
With these in place, you’re ready to work through the checklist.
Step 1: Check Crawlability and Indexation
Nothing else matters if Google can’t crawl your site. Therefore, this is where every technical SEO audit checklist should begin.
Open Search Console and review the Index Coverage report. Look for pages marked “Excluded” that should actually be indexed. This often reveals a misconfigured robots.txt file or an accidental noindex tag. Meanwhile, run your crawler alongside Search Console data to catch anything Google might have missed. Then cross-reference both reports against Google’s own guidance on crawling and indexing.
Checklist:
- Confirm robots.txt isn’t blocking important sections
- Check for accidental noindex tags on key pages
- Review the Index Coverage report for errors and exclusions
- Submit an updated XML sitemap through Search Console
- Crawl the site and compare results against indexed pages
If you’d rather skip the manual digging, our free SEO audit flags crawl and indexation issues automatically within minutes.
Step 2: Audit Your Site Architecture and URL Structure
A tidy structure helps both users and search engines find their way around. In contrast, a messy one buries your best content several clicks deep, where it rarely gets crawled or ranked.
Aim for a flat structure where important pages sit no more than three clicks from the homepage. Additionally, keep URLs short, descriptive and consistent, since long strings of parameters confuse bots and visitors alike.
Checklist:
- Map your site’s click depth from the homepage
- Simplify URLs (remove unnecessary parameters, use hyphens not underscores)
- Confirm your main navigation reflects your priority pages
- Find orphan pages (no internal links pointing to them) and link to them
Step 3: Analyse Core Web Vitals and Page Speed
Site speed remains one of the more measurable ranking signals available, and it isn’t going away. Google’s own Core Web Vitals guidance confirms these metrics work alongside relevance and content quality. Yet current data shows only around 56% of tracked origins pass all three thresholds. As a result, there’s real room to gain ground here.
To pass in 2026, aim for three things: Largest Contentful Paint under 2.5 seconds, Interaction to Next Paint under 200 milliseconds, and Cumulative Layout Shift under 0.1.
Checklist:
- Run PageSpeed Insights on your five highest-traffic pages
- Confirm LCP, INP and CLS scores against the thresholds above
- Compress and lazy-load images
- Minify CSS and JavaScript, and defer anything non-essential
- Check server response times (TTFB)
Step 4: Confirm Mobile-Friendliness
Google indexes the mobile version of your site first, not the desktop one, so this step carries real weight. It matters even more if a large share of your audience browses on mobile data. That describes most of the African market, where mobile remains the primary route online, according to GSMA’s Mobile Economy Africa 2026 report.
Checklist:
- Run Google’s Mobile-Friendly Test on key pages
- Confirm tap targets, fonts and layout work on small screens
- Check that mobile content matches desktop content exactly
- Test load times on a throttled connection
Step 5: Review HTTPS and Site Security
Security is a smaller ranking signal on its own, but it carries outsized weight in user trust. Google confirmed HTTPS as a ranking signal back in 2014. Today, a “Not Secure” warning in Chrome sends most visitors straight back to the search results.
Checklist:
- Confirm your entire site runs on HTTPS, not just the homepage
- Check for mixed content warnings (HTTP resources on HTTPS pages)
- Verify your SSL certificate hasn’t expired
- Redirect all HTTP versions of URLs to HTTPS
Step 6: Find Duplicate Content and Fix Canonical Tags
Duplicate content splits ranking signals between two or more near-identical pages. As a result, neither one performs as well as a single, consolidated version would. Consequently, canonical tags matter more than most site owners realise.
Checklist:
- Use your crawler to identify duplicate or near-duplicate pages
- Add self-referencing canonical tags to unique pages
- Point canonicals on filtered or parameter-based URLs to the main version
- Confirm www and non-www versions resolve to one canonical domain
Step 7: Add Structured Data and Schema Markup
Schema markup doesn’t directly move rankings, but it shapes how search engines and AI tools understand your content. Recent research into structured data’s role in AI search visibility found notably higher citation rates on pages with robust schema. That alone makes this step worth the effort, particularly as more traffic starts arriving through AI search.
Schema also ties closely into building topical depth. We cover that in more detail in our piece on authoritative content for GEO.
Checklist:
- Add Organization and Website schema sitewide
- Add Article or BlogPosting schema to blog content
- Add FAQ schema to pages with genuine Q&A content
- Validate every schema type with Google’s Rich Results Test
Struggling to prioritise which fixes matter most? Our free SEO audit ranks your schema gaps alongside every other issue on this list.
Step 8: Hunt Down Broken Links and Redirect Chains
Broken links waste crawl budget and frustrate visitors in equal measure. Redirect chains do the same thing more quietly. Each extra hop slows the page and dilutes the SEO value passed along.
Checklist:
- Crawl the site for 404 errors and fix or redirect them
- Identify redirect chains and shorten them to a single hop
- Check for broken outbound links to external sites
- Update internal links that still point to old URLs
How Often Should You Repeat This SEO Audit Checklist?
Now that you know how to do an SEO audit from top to bottom, put it on a schedule rather than treating it as a one-off. A full technical SEO audit deserves a slot on your calendar roughly every six months. Run it again immediately after any major site change, such as a migration or redesign. Between full audits, however, lighter monthly checks on crawl stats, index coverage and Core Web Vitals keep small issues from snowballing into big ones.
Let Welcome Tomorrow Take This Off Your Plate
Working through this checklist by hand takes time most teams don’t have lying around. That’s precisely why we built a faster route. Book your free audit with Welcome Tomorrow, one of the leading growth marketing agencies in Africa. We’ll hand you a prioritised list of fixes instead of a checklist to work through alone. Visit Welcome Tomorrow to see how our team approaches technical SEO, GEO and everything in between.
Technical SEO Audit FAQs
What’s the Difference Between a Technical SEO Audit and a Full SEO Audit?
A technical SEO audit only covers crawlability, indexation, speed, security and structure. A full SEO audit adds content quality, keyword strategy [Insert Internal Link to relevant article on keyword research here] and backlink profile on top, so it’s broader but slower to complete.
How Long Does a Technical SEO Audit Take?
A small site might take a few hours. Larger, older sites with thousands of pages can take several days. That’s especially true if you fix issues as you find them rather than just logging them.
Can You Run an SEO Audit for Free?
Yes. Google Search Console and PageSpeed Insights cost nothing. Tools like RankTomorrow also generate a free automated report in under a minute.
