An XML Sitemap is a structured file, written in XML format, that lists the important pages of a website to help search engines like Google and Bing discover and index content more efficiently. By providing a roadmap of URLs, an XML Sitemap ensures that search engine crawlers can easily find and understand the organization of a site, including pages that might not be easily accessible through standard navigation. This is especially useful for large websites, new sites with few external links, or pages with rich media content. Regularly updating and submitting an XML Sitemap can improve a website s visibility and indexing speed in search engine results.