What is technical SEO?

Technical SEO covers the infrastructure side of search optimization: making sure search engines can crawl, load, and index your pages correctly, entirely separate from what those pages actually say to a reader.

That includes site speed, mobile usability, a clean sitemap and robots.txt file, proper redirects when URLs change, and avoiding duplicate content issues that confuse crawlers about which version of a page they should actually rank.

It is invisible to most visitors but genuinely foundational to everything else. Great content sitting on a technically broken site often never even gets indexed properly in the first place, no matter how good it is.

Pages built to pass a technical check before they publish is a baseline feature of automatic SEO software.