Little Glossary · Measurement and search

Technical SEO

Technical SEO is the part of search optimization that makes sure search engines can crawl, render, understand and index a website properly. It covers architecture, code, performance and server configuration.

Updated October 5, 2026

The main areas

  • Crawling: making sure bots can reach the pages. robots.txt, internal linking, XML sitemap and no broken links or redirect chains.
  • Indexing: making sure the right pages get indexed and the wrong ones don't. noindex tags, canonical URLs for duplicate content and correct status codes (200, 301, 404, 410).
  • Rendering: making sure important content is in the HTML or that Google can run the JavaScript that generates it. Sites that rely entirely on the browser to display content can take longer to be indexed.
  • Performance and experience: Core Web Vitals, HTTPS and mobile compatibility. Google uses the mobile version of pages for indexing.
  • Internationalization: hreflang tags linking the versions of each language, such as a Spanish page and its English translation.
  • Structured data that helps search engines understand content.

Common problems on B2B websites

  • Staging environments indexed, with duplicate content.
  • Redesigns that change URLs without redirects.
  • Tag, filter or parameter pages that generate thousands of worthless URLs.
  • Misconfigured hreflang: no return link, or pointing to pages that redirect.
  • Key content loaded only with JavaScript.
  • The same titles and meta descriptions on every page of a template.

Tools

  • Google Search Console: indexing, search performance, crawl errors and Core Web Vitals.
  • Crawlers such as Screaming Frog or Sitebulb, which go through the site the way a search engine would.
  • PageSpeed Insights and Lighthouse for performance.

Related terms

Sources

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