Technical SEO Audits
A technical SEO audit is a structured review of a website's crawlability, indexability, rendering, performance, and site architecture to find issues that can limit organic search visibility.
Start here
- Start with Google Search Console's Coverage report to find crawl and index errors.
- Use a crawl tool to surface broken links, redirect chains, and canonical misconfigurations.
- Check Core Web Vitals — performance is a ranking factor.
- Don't fix everything at once; prioritize issues that block indexing or cause duplicate content.
- Make audits a recurring process, not a one-time event.
What I'd do first
- Open Google Search Console and check the Coverage report for errors, warnings, and excluded pages.
- Crawl your site with Screaming Frog (or Semrush) and export all 4xx and 5xx URLs.
- Review your robots.txt and XML sitemap to ensure important pages aren't blocked or missing.
- Check canonical tags on your top 20 pages to confirm they point to the correct URL.
- Run a Core Web Vitals report in Search Console to spot performance issues.
Plain-English take
Think of a technical SEO audit as a health check for your website's plumbing. You're not looking at the content or the design — you're checking whether search engines can actually find, crawl, and understand your pages. If a page is blocked by robots.txt, has a broken canonical, or loads too slowly, it doesn't matter how good the content is. The audit surfaces those hidden blockers so you can fix them before they hurt your rankings.
When it actually matters
- After a site migration — URLs, redirects, and canonicals often break.
- When traffic drops suddenly — a technical issue might be blocking indexing.
- Before a content push — ensure the new pages are crawlable and indexable.
- Quarterly for large sites — crawl issues accumulate over time.
- After a major CMS update — plugins or themes can introduce noindex or broken links.
What I got wrong
- I used to treat the audit as a one-time checklist. Now I run it monthly because sites change constantly.
- I'd fix obvious 404s but ignore indexation and canonical issues. Those hurt more in the long run.
- I trusted crawl tools blindly without cross-checking in Search Console or server logs. Always validate.
- I spent time on low-impact issues (like missing alt text) while leaving blocked pages unresolved. Prioritize blockers first.
Next step
Sources
Primary documentation is linked directly. Anything commercial is marked nofollow.
- Google Search Central — Primary source for crawl, index, sitemaps, robots, canonicals, rendering, and Search Console guidance.
- Google Search Console Help — Best reference for coverage, sitemap, manual action, and inspection reports used during audits.
- Google Search Central: Core Web Vitals — Authoritative source for performance metrics and user-experience thresholds relevant to technical audits.
- Screaming Frog SEO Spider documentation — Widely used crawl-tool reference for technical site auditing workflows.
- Semrush Blog: Technical SEO Audit — Practical audit workflow and common checklist items.
Notes from Callum Bennett.