Technical SEO

Technical SEO is the foundation everything else stands on. If crawlers cannot reach a page, content quality is irrelevant. The 2026 priorities: HTTPS, mobile-first, Core Web Vitals (LCP, CLS, INP), clean URL structure, comprehensive schema, and fast TTFB.

Related terms

• Canonical Tag — An HTML element (<code>&lt;link rel=&quot;canonical&quot;&gt;</code>) that tells search engines which version of a URL is the authoritative one when duplicate or near-duplicate content exists.
• sitemap.xml — An XML file at the root of a domain that lists every URL you want crawlers to index, with optional metadata like last modification date and change frequency.
• robots.txt — A plain-text file at /robots.txt that tells web crawlers (search engines and AI bots) which pages they may access. Mis-configuring it is the #1 way brands accidentally block themselves from AI engines.