A hierarchical visual model of the pages of a Web site. Site maps help users navigate through a Web site that has more than one page by showing the user a diagram of the entire site's contents. Similar to a book's table of contents, the site map makes it easier for a user to find information on a site without having to navigate through the site's many pages. Also, in SEO, a site map can make it easier for a search engine spider to find all a site's pages.
all Web sites will have a site map. The less intricate a site is the less need there is for a site map to guide users.See the related links below for two examples of site maps.Help is google clower.It is HTML sitemap use website user .Google clower use only XML map.
Sitemaps are an easy way for webmasters to inform search engines about pages on their sites that are available for crawling. In its simplest form, a Sitemap is an XML file that lists URLs for a site along with additional metadata about each URL (when it was last updated, how often it usually changes, and how important it is, relative to other URLs in the site) so that search engines can more intelligently crawl the site.
Web crawlers usually discover pages from links within the site and from other sites. Sitemaps supplement this data to allow crawlers that support Sitemaps to pick up all URLs in the Sitemap and learn about those URLs using the associated metadata. Using the Sitemap protocol does not guarantee that web pages are included in search engines, but provides hints for web crawlers to do a better job of crawling your site.
which is a standard, validated and used by Google and most other search engines.
A Sitemap allows you to create a file hosted among the other files in your account that informs the search engines of all pages your website contains. In other words, it provides the search engine with detailed information about the content of your website.
Although Sitemaps are mainly used to improve the index process of your website by search engines, they can be used to provide accessibility to certain pages as well. For example, pages that are not accessible via your menus, can be indexed by the search engine if you want.
The Sitemap does not affect the normal way crawler bots index your page – it just extends the visibility and accessibility of your content.