XML Sitemaps are specifically designed to be a machine-readable list all of the individual pages on a site, when they were last updated, how frequently they're

XML Sitemaps are specifically designed to be a machine-readable list all of the individual pages on a site, when they were last updated, how frequently they're usually updated, and how important a page is to your site. HTML Sitemaps are the user-friendly (YMMV), human-readable equivalent.