An XML sitemap is a simple XML file that contains the information about one or more URLs on your Web site. The information that is stored there helps the search engines better spider your site.

Sitemap is a .xml file , which holds all necessary information related to pages, meta tags and so on.

sitemap.xml is a list of pages on your Website. It is easiest way to give Google, and other search engines, information about your website.

hello friend, a sitemap carries all active URL of website that's resides in the root DIR of hosting. It is most convenient methods to represent all active URL to search engines for better indexing. Almost all search top search engines like Goolge, Bing, http://www.oko69.com , Baidu ...... seeks and respect the presence of sitemaps.

Create sitemap and put map url in webmaster tools

Is my site's sitemap ok?

Sitemap is an index page of your website that offers link the web page of your website.Sitemap are two types:-
1- XML sitemap
2- HTML sitemap

An XML sitemap is a fairly simple XML file that contains information about one or more URLs on your Web site. The information that is stored there helps search engines better spider your site.