You can write the best content in your industry, but if Google can’t crawl, read and trust your website, it will never rank. That’s what technical SEO fixes — the foundations beneath your content. This technical SEO checklist walks through every layer that affects how Google finds and ranks your pages, in plain English.
What does a technical SEO checklist cover? It covers crawlability, indexing, site speed and Core Web Vitals, mobile-friendliness, HTTPS security, site architecture, structured data, and clean URLs and redirects. Get these right and Google can find, understand and rank every page you publish.
Why technical SEO decides who ranks
Think of technical SEO as the foundation under your house. You can decorate every room beautifully, but if the foundation is cracked, the whole structure is unstable. Slow load times, pages Google can’t index, broken internal links and missing structured data are those cracks. Fixing them often produces faster ranking gains than publishing new content, because you’re unlocking value that already exists on your site.
The technical SEO checklist
1. Crawlability
Make sure search engines can reach your pages. Your robots.txt file should not block important content, and you should have a valid XML sitemap submitted in Google Search Console. Check for crawl errors and fix anything blocking key pages.
2. Indexing
Crawlable isn’t the same as indexed. Check the Pages report in Search Console for URLs that are excluded, and make sure no important page carries an accidental “noindex” tag. Every page you want to rank must be indexable.
3. Site speed and Core Web Vitals
Speed is both a ranking factor and a conversion factor. Aim for a fast Largest Contentful Paint, low Cumulative Layout Shift, and responsive interaction (INP). Compress and lazy-load images, defer non-critical scripts, and use caching and a CDN. Google’s Core Web Vitals guidance explains the targets in detail.
4. Mobile-friendliness
Google indexes the mobile version of your site first, so it must be fully responsive, easy to tap, and free of intrusive pop-ups. Most local and small-business searches happen on phones, so a poor mobile experience costs you both rankings and customers.
5. HTTPS and security
Your site needs a valid SSL certificate (the padlock) and no “mixed content” warnings. HTTPS is a confirmed ranking signal and a basic trust requirement for visitors.
6. Site architecture and internal links
A logical structure with smart internal linking helps Google understand which pages matter most and passes authority where it counts. Important pages should be reachable within a few clicks of your home page. Internal links also help readers — for example, linking this checklist to your local SEO and reporting guides.
7. Structured data (schema)
Schema markup — such as Article, FAQ and LocalBusiness — helps you earn rich results like star ratings, FAQs and breadcrumbs, which lift your click-through rate. It also makes your content easier for AI search engines to understand and cite.
8. Clean URLs, redirects and canonicals
Use short, descriptive URLs. Apply 301 redirects when you move or delete pages, and avoid redirect chains and broken links. Use canonical tags so duplicate or very similar pages don’t split your ranking signals.
How to keep on top of technical SEO
Technical SEO isn’t a one-off. Run a full crawl quarterly, and each month check Core Web Vitals, the indexing report and broken links in Search Console. Fix new issues quickly before they drag down rankings, and pair this with your monthly SEO report so you always know what’s working.
Frequently asked questions
What is technical SEO?
Technical SEO is optimising the infrastructure of your website — crawling, indexing, speed, mobile, security and structured data — so search engines can access, understand and rank your content.
How often should I do a technical SEO audit?
A full audit quarterly, with a quick monthly check of Core Web Vitals, indexing and broken links to catch new issues early.
Does technical SEO improve rankings on its own?
It removes the barriers holding you back. Combined with helpful content and quality links, it’s a major ranking lever — especially for larger sites.
Do I need a developer for technical SEO?
Some fixes (speed, redirects, schema) are easier with developer help, but many — like sorting your sitemap or fixing broken links — can be handled with the right guidance or an SEO partner.
Free resource: work through our free 50-point SEO audit checklist to see exactly what to fix on your site – no email required.
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