How to pass the XML Sitemap test?
Sitemaps is a protocol in XML format meant for a webmaster to inform search engines about URLs on a website that are available for web crawling. It allows webmasters to include additional information about each URL: when it was last updated, how often it changes, and how important it is in relation to other URLs of the site. This allows search engines to crawl the site more efficiently and to find URLs that may be isolated from the rest of the site's content. The Sitemaps protocol is a URL inclusion protocol and complements robots.txt, a URL exclusion protocol.
Google first introduced Sitemaps 0.84 in June 2005 so web developers could publish lists of links from across their sites.[1] Google, Yahoo! and Microsoft announced joint support for the Sitemaps protocol in November 2006.[2] The schema version was changed to "Sitemap 0.90", but no other changes were made.