There are two type of sitemaps. One is sitemap for your visitor’s navigation and that usually has html, asp or php etc extension like the rest of your page The other type is Sitemap.xml which is made specifically for Google crawler and usually start with capital letter S.
A lot of webmasters feels that getting indexed by Google is really out of their hands. This is not the case, they can help to some degree. Though the indexing of a site is done by bots or crawlers, site will be indexed just fine without any help from the webmasters. So why bother with Sitemap?.
