You can have the best content in your market and still not rank if search engines can't crawl, render and trust your site. Technical SEO is the foundation everything else sits on. This checklist covers the essentials every site should get right.
Make sure search engines can crawl and index you
Before you can rank, Google has to find and store your pages. Two files control this: robots.txt (what crawlers are allowed to access) and your XML sitemap (the list of pages you want indexed). Misconfigure robots.txt and you can accidentally block your whole site.
Check that important pages aren't set to noindex, aren't blocked in robots.txt, and appear in your sitemap — which should be submitted in Google Search Console.
Get your Core Web Vitals in order
Page experience is a ranking factor, and slow pages lose both rankings and conversions. Google measures three Core Web Vitals — loading (LCP), interactivity (INP) and visual stability (CLS).
Common wins:
- Compress and correctly size images (they're usually the biggest culprit).
- Reduce and defer non-critical JavaScript.
- Reserve space for images/embeds so the layout doesn't jump.
- Use caching and a good host.
Be genuinely mobile-friendly
Google indexes the mobile version of your site first. If your mobile experience is cramped, slow, or missing content that's on desktop, your rankings suffer. Test key pages on a real phone, not just a resized browser.
Secure, clean URLs and structure
Serve everything over HTTPS, use readable URLs, and give your site a logical hierarchy so both users and crawlers understand how pages relate. A flat, sensible structure with strong internal linking spreads authority to the pages that matter.
Help Google understand with structured data
Schema.org markup (JSON-LD) tells search engines exactly what a page is — an article, a product, an FAQ, a local business. It doesn't directly boost rankings, but it unlocks rich results (stars, FAQs, prices) that lift click-through rates. Add the schema types that fit your content.
Frequently asked questions
Do I need to be technical to do technical SEO?
The basics — checking indexing, compressing images, adding schema — are approachable for most site owners, especially on modern platforms. Deeper issues (render-blocking resources, crawl budget, JavaScript SEO) are where a specialist earns their keep.
What's the single most impactful technical fix?
It depends on the site, but for most businesses it's page speed (Core Web Vitals) and making sure important pages are actually indexable. A fast, crawlable site is the baseline everything else builds on.
How do I check my site's technical health?
Google Search Console (indexing + Core Web Vitals) and a quick on-page audit are the fastest starting points. Our free website audit tool flags many of these issues automatically.