The Technical SEO Checklist: 15 Fixes That Move Rankings
A prioritised, actionable checklist of the 15 technical SEO issues that show up most consistently in audits and move the needle fastest when fixed. With specific instructions for each.
Technical SEO audits keep finding the same problems. Look across hundreds of small-business sites. The issues that block rankings fall into a short, predictable list. So you do not need a custom 200-point audit. You need this technical SEO checklist of 15 fixes. Work through them in order. Use free tools any site owner can get. This is not a full crawl of every issue you could have. It is the list that moves rankings. These fixes give you the most gain per hour of work.
Before you start, set up Google Search Console. It is free. Submit your XML sitemap if you have not yet. Search Console feeds data to eight of the fifteen checks below. So set it up first. The data turns this checklist from guesswork into clear priorities.
Crawl and indexing checks (items 1-5)
These five checks make sure Google can find your pages. They also let Google access and index them. Content and links do not matter if these basics are broken.
1. Indexing coverage audit. Go to Google Search Console → Index → Pages. Compare the "Indexed" page count to your real page count. Then review every "Not indexed" reason. Look for "Crawled - currently not indexed." That one points to a content quality issue. Look for "Discovered - currently not indexed." That one points to crawl budget or priority. Look for "Blocked by robots.txt." That one is an accidental crawl block. Fix any accidental blocks first. They are often the easiest, highest-impact fix.
2. Robots.txt check. Visit yourdomain.com/robots.txt and read it. Make sure it blocks no directory that you want Google to crawl. One common mistake is adding "Disallow: /" while the site is in development. People then forget to remove it. And that blocks Google from crawling the whole site.
3. Accidental noindex tags. Crawl your site with Screaming Frog SEO Spider. It is free up to 500 URLs. Filter by meta robots. Any unwanted "noindex" page is costing you rankings. Check this after CMS updates and plugin changes. They often add or change meta robots tags.
4. XML sitemap health: your sitemap should list every page you want indexed. It should list no pages you do not. It should list no redirect URLs. Sitemaps should hold only canonical, live 200-status URLs. Validate your sitemap at xml-sitemaps.com. Then check Search Console's Sitemap report for errors.
5. Orphaned pages check. Pages with no internal links often get missed in Google's crawl. Use Screaming Frog's "Orphan Pages" report to find them. The path is Configuration → Spider → Check orphan pages. Every important page needs at least one contextual internal link. And it has to come from a page that is indexed.
Performance checks (items 6-8)
These three checks cover user experience signals that you can measure. Google uses these signals as ranking factors. It does so directly.
6. Core Web Vitals field data. Open Search Console → Experience → Core Web Vitals. Count the URLs in the "Poor" and "Needs improvement" buckets. Check both mobile and desktop. Run every failing URL group through PageSpeed Insights. You can find it at pagespeed.web.dev. It gives you specific fixes. Fix mobile first. Google weights mobile scores more under mobile-first indexing. See Core Web Vitals explained for the full breakdown.
7. Image optimisation. Images are the top cause of poor LCP scores. Check your five most-visited pages with PageSpeed Insights. Then go to the Opportunities section. Look for "Properly size images." Look for "Serve images in next-gen formats." And look for "Efficiently encode images." Convert your PNG and JPEG files to WebP. Add an explicit width and height to every image. Turn on lazy loading for images below the fold.
8. Time to First Byte (TTFB): test your homepage TTFB with WebPageTest.org. Pick a test location near your server. A TTFB under 800ms is good. Over 1500ms points to hosting or caching problems. Common fixes help here. Move from shared hosting to a VPS or managed host. Turn on server-side caching. Options include LiteSpeed Cache for WordPress, Varnish, or a CDN like Cloudflare. TTFB is the most direct server-side fix. It affects every page on your site at once.
Mobile and HTTPS checks (items 9-10)
These two checks are baseline requirements. You cannot skip them and rank well in 2026.
9. Mobile usability. Open Search Console → Experience → Mobile Usability. Check for any URLs with errors. One common error is text that is too small. Another is clickable elements that are too close. Another is content that is wider than the screen. And another is a viewport that is not set. Fix every item it flags. Then test your three most important pages. Use Google's Mobile-Friendly Test. You can find it at search.google.com/test/mobile-friendly. See mobile-friendly website SEO for what it all means.
10. HTTPS and mixed content. Confirm your site serves only over HTTPS. Then check for mixed content. That means HTTP resources loaded on HTTPS pages, such as images, scripts, or CSS. Use Chrome's security panel to find it. The path is Inspect → Security → View certificate. Or use the free tool Why No Padlock at whynopadlock.com. Mixed content can trigger a "not secure" warning in Chrome. It can also suppress the full HTTPS ranking benefit.
The best technical SEO audit takes about two hours with free tools. Most ranking problems are not subtle. They show up in Search Console as clear errors. They show up in PageSpeed Insights as failing scores. They show up in Screaming Frog as red rows in a spreadsheet.
Structured data and on-page technical checks (items 11-13)
These checks improve how Google understands your content. They also improve how it shows up in search results.
11. Schema markup validation. Use Google's Rich Results Test at search.google.com/test/rich-results. Run it on your homepage, a service page, and a blog post. Confirm each page has the right schema. Use LocalBusiness, FAQPage, and Article or BlogPosting in that order. Make sure Google shows "eligible for rich results," not just "valid." Fix any errors it flags. See what is schema markup for how to set it up.
12. Canonical tag audit. Run Screaming Frog and export all canonical tags. Every page should have a self-referencing canonical tag. That tag should point to its own URL. Some tags point to the wrong URL. Some pages have none at all. Both of these create duplicate content confusion. And both can dilute your ranking authority.
13. Title tags and meta descriptions. Crawl your site with Screaming Frog. Check for missing title tags. Check for duplicate title tags. Check for title tags over 60 characters. Those get cut off in search results. Check for missing meta descriptions. Every page that can earn organic traffic needs a unique title tag. That tag must contain the keyword. The page also needs a compelling meta description. Missing or duplicate title tags are one of the most common quick wins.
Architecture and redirect checks (items 14-15)
These last two checks cover authority flow. They also cover URL health across your site.
14. Redirect chain audit. Screaming Frog's Redirect Chains report finds pages that redirect through several hops. Think 301 → 301 → final destination. Each hop loses some link equity. Collapse chains to single direct redirects where you can. Also check for redirect loops. A loop is a URL that redirects to itself. It can also redirect to a URL that points back to it. Loops stop those pages from being crawled. They stop them being indexed too.
15. Internal link depth and anchor text. Export your full site crawl from Screaming Frog. Sort by "Crawl Depth." Some pages sit more than four clicks from the homepage. Those need better internal linking. Add them to an existing high-authority page. Or link to your top commercial pages from the homepage or main navigation. At the same time, check the links to your most important pages. Their anchor text should be descriptive and keyword-relevant. Avoid "click here" or "read more." Internal linking strategy covers this in full depth.
How often should you run this checklist?
Run the full checklist at least once every six months. Also run it right after any major site change. That includes a redesign. It includes a platform migration. It includes a new plugin. It includes a content audit that removes or rewrites pages. Technical SEO drifts over time. Plugins update and add noindex tags. Redirects pile up and form chains. Images get uploaded without optimisation. A twice-a-year audit catches these issues early. It stops them before they cause big ranking losses.
Which item on this list moves rankings fastest?
It depends on what is broken. Say you have accidental noindex tags or robots.txt blocks. Those are items 2-3. Fixing them can restore rankings in days, once Google re-crawls the pages. Say you have Core Web Vitals failures, item 6, and your rivals pass. Better scores move rankings in four to six weeks, as field data updates. Say you have missing title tags, item 13. Google re-processes those fast, sometimes within two to three weeks. In general, fix any discovered or indexed blockers first. Those are items 1-5. Then fix performance, items 6-8. Then handle the rest in order.
Should you hire someone or do this yourself?
Any fairly tech-savvy owner can do items 1-5 and 11-13. The free tools above make it possible. Items 6-8 cover Core Web Vitals work. That goes beyond simple image fixes. Items 14-15 cover redirect chain cleanup on large sites. Both often need a developer. Here is the plan. Do what you can yourself right away. Brief a developer on the items that need code changes. Then budget that work accurately. Use the cost context in how much SEO costs for a small business.
Keep reading
Each item here has its own deep-dive article. For performance, see Core Web Vitals. You can also see page speed SEO. For crawling, see how Google crawls and indexes your website. For architecture, see site architecture and URL structure. And for the full strategy, see what is technical SEO.
Sources
- Google Search Central - Search Console documentation, Core Web Vitals thresholds, and structured data guidelines. developers.google.com/search
- Screaming Frog - SEO Spider tool documentation and audit methodology. screamingfrog.co.uk
- Ahrefs - technical SEO audit framework and ranking factor research. ahrefs.com/blog
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