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 possible issue. It is the ranking-moving list. These fixes give you the most improvement per hour of work.
Get Google Search Console ready before you begin. It's free. Submit your XML sitemap if you haven't already. Search Console gives info for eight of the fifteen checks here. Set it up first. The data makes this list clearer. You'll know what to do first.
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" (a content quality issue). Look for "Discovered - currently not indexed" (a crawl budget or priority issue). Look for "Blocked by robots.txt" (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 you want Google to crawl. One common mistake is adding "Disallow: /" during development. People forget to remove it. That blocks Google from crawling the whole site.
3. Accidental noindex tags: crawl your site with Screaming Frog SEO Spider (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: These are pages with no internal links. Google often misses these when crawling. Use Screaming Frog's "Orphan Pages" report to find them. Go to Configuration → Spider → Check orphan pages. Every important page needs at least one contextual internal link. That link must come from an indexed page.
Performance checks (items 6-8)
These three checks cover user experience signals you can measure. Google uses these signals directly as ranking factors.
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 (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. In the Opportunities section, look for "Properly size images." Look for "Serve images in next-gen formats." Look for "Efficiently encode images." Convert PNG and JPEG files to WebP. Add explicit width and height to every image. Turn on lazy loading for below-the-fold images.
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 checks are must-haves. You can't skip them. You won't rank well without them. This is true for 2026.
9. Mobile usability: open Search Console → Experience → Mobile Usability. Check for any URLs with errors. Common errors include text too small and clickable elements too close. Others include content wider than the screen and a viewport that is not set. Fix every flagged item. Then test your three most important pages. Use Google's Mobile-Friendly Test (search.google.com/test/mobile-friendly). See mobile-friendly website SEO for the full implications.
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 (Inspect → Security → View certificate). Or use the free tool Why No Padlock (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 Google surfaces it in search results.
11. Check schema markup with Google's Rich Results Test (search.google.com/test/rich-results). Run the test on your homepage. Test a service page and a blog post too. Make sure each page has the right schema. Use LocalBusiness, FAQPage, and Article or BlogPosting in that order. Google should show "eligible for rich results." Do not settle for just "valid." Fix any errors it flags. See what is schema markup for help.
12. Run Screaming Frog. Export all canonical tags. Every page needs a self-referencing canonical tag. That tag must point to its own URL. Some tags point to the wrong URL. Some pages lack a canonical tag. Both issues cause duplicate content confusion. They can weaken your ranking authority.
13. Title tags and meta descriptions: crawl your site with Screaming Frog. Check for missing title tags. Find any duplicate title tags. Look for titles over 60 characters. These get cut off in search results. Check for missing meta descriptions too. Every page needs a unique title tag. It must have the keyword. Each page also needs a good meta description. Missing or duplicate title tags are easy fixes.
Architecture and redirect checks (items 14-15)
These last two checks cover two things. They look at how power moves through your site. They also check the condition of all URLs on your site.
14. Redirect chain audit: Screaming Frog's Redirect Chains report finds pages with many hops (301 → 301 → final destination). Each hop loses some link equity. Collapse chains when you can. Also check for redirect loops. A loop is a URL that redirects to itself. It may also point back to the first URL. Loops stop pages from being crawled and indexed.
15. Check internal link depth and anchor text. Export your full site crawl from Screaming Frog. Sort by "Crawl Depth." Pages over four clicks from the homepage need help. Add them to a high-authority page. Or link to top commercial pages from the homepage or main navigation. Check links to important pages too. 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 or a platform migration. It includes a new plugin or 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 (items 2-3). Fixing those can restore rankings in days, once Google re-crawls the pages. Say you have Core Web Vitals failures (item 6) and your competitors 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 (items 1-5). Then fix performance (items 6-8). Then handle the rest in order.
Should you hire someone or do this yourself?
Most tech-savvy owners can do steps 1-5 and 11-13. The free tools above make it possible. Steps 6-8 go beyond simple fixes. Steps 14-15 clean up redirect chains on big sites. Both often need a developer. Here is the plan: Do what you can yourself right away. Tell a developer about steps needing code changes. Use the cost context in how much SEO costs for a small business to budget that work accurately.
Keep reading
Each item here has its own deep-dive article. For performance, see Core Web Vitals and page speed SEO. For crawling, see how Google crawls and indexes your website. For architecture, see site architecture and URL structure. 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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