Extensible Markup Language (XML) is an acronym for "Extensible Markup Language." The purpose of an XML sitemap is to provide search engines with information about the most recent changes made to them. It contains a list of websites and the frequency with which they are updated. Using an XML sitemap, we may request that search engines regularly scan and index our essential pages. When a search engine discovers a website, among the first things it looks for is a sitemap.