Search engines
XML Sitemap
An XML sitemap is a file listing the addresses on a site that its owner wants search engines to know about, usually at /sitemap.xml. It helps discovery, particularly for pages that few internal links point to, and it can carry the date each page last changed. It is a discovery aid rather than an instruction: listing a page does not oblige a search engine to index it.
A sitemap is most useful on large sites, newly launched sites, and sites where some pages sit deep in the structure. On a small, well-linked site it changes little, though there is no cost to having one.
Accuracy matters more than completeness. A sitemap listing redirected addresses, pages that return errors, or pages marked noindex sends mixed signals about which pages are the real ones.
The last-modified date should reflect a genuine content change. Rewriting every date on every build to the current day makes the field meaningless, and search engines learn to disregard it.
Why it matters
A sitemap is how a search engine finds pages that nothing on the site links to prominently.
Related terms
Last reviewed 2026-09-04. All Saige glossary terms.