Sitemap

A sitemap is an index of the pages on a website. In SEO the term almost always means the XML sitemap: a machine-readable file listing your URLs, so search engine crawlers can find all content quickly, including the pages that sit deep in the structure or carry few internal links.

The file usually lives at /sitemap.xml, and most content management systems generate it automatically. Beyond the URLs themselves, a sitemap can state lastmod, when a page last changed, and Google uses that field actively when it decides what to recrawl. Large sites split the sitemap into several files collected under a sitemap index, and alongside web pages there are dedicated sitemaps for images, video and news.

A sitemap also works together with Google Search Console, where a submitted sitemap produces reports on how many of the listed pages are actually indexed. A gap between submitted and indexed is often the first visible sign of a technical problem.

For rankings, a sitemap is an aid to discovery and not a ranking factor. Pages can rank without one when the internal link structure is strong. On large sites it protects the crawl budget, and new content gets found sooner, both by Googlebot and by the AI crawlers collecting content for ChatGPT and similar services. The mechanics belong to the guide on crawling and indexing.