What is technical SEO?

Technical SEO covers the parts of a site that affect how search engines access and understand it. It includes crawlability, indexability, URLs, redirects, canonicalization, structured data where appropriate, mobile behavior, performance, and server responses.

Start with fundamentals. Important pages should return successful responses, be publicly accessible, contain useful HTML, and be reachable through crawlable links. Do not accidentally block important pages with robots.txt, authentication, or noindex rules.

Use a sitemap to help communicate the URLs you care about. Keep URLs stable and understandable. When content moves, use appropriate redirects and review canonical URLs rather than creating several competing versions.

Technical SEO is not a license to add complexity. A simple site with clean HTML and clear links can be easier to crawl than an elaborate system full of unnecessary scripts and duplicate URLs.

Use Search Console, browser tools, server logs, and URL inspection to diagnose actual problems. Fix the specific failure you can observe instead of applying a generic checklist to every page.

Google's Core Web Vitals are three page-experience measures: Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift. web.dev calls a visit good when the largest content paints within 2.5 seconds, the page responds to an interaction within 200 milliseconds, and layout shift stays at 0.1 or below. Interaction to Next Paint replaced First Input Delay in 2024. A perfect score is not a ranking promise. A page people cannot load is still a problem.