A sitemap is a list of pages of a web site accessible to crawlers or users. It can be either a document in any form used as a planning tool for web design, or a web page that lists the pages on a web site, typically organized in hierarchical fashion. This helps visitors and search engine bots find pages on the site.
Questions having the sitemap tag regard the user experience of sitemaps.
Reference: http://en.wikipedia.org/wiki/Sitemap
