The Technical SEO Audit: A Practical Checklist

A technical SEO audit isn’t about generating a 200-point report nobody reads. It’s about answering one question in the right order: can Google find, crawl, render and trust your pages — and do they load fast enough to keep the visitor you worked so hard to attract? Get the sequence wrong and you’ll spend weeks polishing meta tags on pages Google can’t even reach. Here’s the checklist we actually run, in the order that matters.

Start with crawlability and indexation

Nothing else counts if Google can’t access your pages. Begin at the gate.

• robots.txt — make sure you’re not accidentally blocking CSS, JavaScript or whole directories. A single stray Disallow: / has tanked more sites than any algorithm update.
• Indexation coverage — in Google Search Console, compare how many pages you want indexed against how many actually are. Big gaps in either direction are the story.
• noindex and canonical tags — check that important pages aren’t quietly carrying a noindex, and that canonicals point where you intend rather than collapsing your catalogue onto one URL.
• XML sitemap — it should list your real, canonical, indexable URLs and nothing else: no redirects, no 404s, no noindex pages.

If a page can’t be crawled and indexed, every other optimisation you make on it is decoration on a door that’s locked.

Then check speed and Core Web Vitals

Once pages can be reached, ask how they feel to a real visitor. Speed is both a confirmed ranking signal and the single biggest lever on conversion. Pull your field data and look at the three Core Web Vitals — loading, responsiveness and visual stability — on mobile first, because that’s how most people arrive. Heavy images, render-blocking scripts and tired hosting are the usual culprits, and they’re cheaper to fix than most people fear.

Confirm mobile parity and structure

Google indexes the mobile version of your site, so the mobile experience is the experience. Check that your mobile pages contain the same content, headings and structured data as desktop — content parity is where mobile-first quietly trips sites up. Then audit the bones of each page:

• One clear <h1> per page, with a logical heading hierarchy beneath it.
• Descriptive, unique title tags and meta descriptions.
• Clean, readable URLs that reflect site structure.
• Structured data (schema) for the content types you have — articles, products, FAQs, local business — validated and error-free.

Structured data won’t rank you on its own, but it’s how you earn rich results and how AI answer engines parse what your page is about.

Don’t forget internal links and redirects

Internal links are the most overlooked item on most audits. Map how authority flows through your site: orphan pages with no internal links are nearly invisible to Google, and your most important pages should be the easiest to reach in clicks. While you’re in there, hunt down redirect chains, loops and links pointing at 404s — each one leaks a little crawl budget and a little patience.

Prioritise, then fix

A finished audit is a ranked list, not a flat one. Sort every issue by impact and effort: a blanket noindex on your money pages is a five-minute fix worth a fortune; a cosmetic schema warning can wait. Fix the things that block crawling and indexing first, then speed, then structure and parity, then the long tail of polish. That sequence is also exactly how we approach website development — building the technical foundations in from the start so the audit finds less to fix.

Not sure where your own site stands? Request a free audit and we’ll hand you a prioritised list of what’s costing you rankings — and what it takes to fix it.