What is Technical SEO?

Technical SEO is the foundation of search visibility. Before content quality or backlinks matter, search engines need to be able to crawl your site, understand its structure, and index it correctly. Technical SEO covers everything in that crawl-to-index pipeline: ensuring robots.txt and sitemaps are configured correctly, pages are indexable, canonical tags prevent duplicate content issues, HTTPS is implemented, and internal linking distributes authority across the site.

The major areas of technical SEO include: site speed and Core Web Vitals (Google uses real-world performance data as a ranking signal), structured data markup (JSON-LD that helps search engines and AI systems understand page content), mobile-friendliness (Google indexes the mobile version of sites first), crawl efficiency (managing how Googlebot spends its crawl budget on large sites), and URL architecture (clean, logical URL structures that help both users and crawlers navigate).

Technical SEO intersects heavily with GEO (Generative Engine Optimisation). A technically sound site — fast, well-structured, with clean markup and comprehensive structured data — is also more machine-readable and therefore more likely to be cited accurately in AI-generated answers. The investment in technical SEO pays dividends in both traditional search rankings and AI visibility.