What Is A Site Map? The sitemap may available on any website, indicating the website’s reliability. The sitemap is a page that holds links of all the pages available on the entire website. With a sitemap, all the pages of the website can be viewed on a single page and any information can be easily found. The sitemap has a very important role in On-page SEO. While doing search engine optimization we submit a sitemap of our site to the search engines. By doing this, the organic ranking of the website improves. A sitemap is a .xml file that contains all the information on the website. This sitemap gives all the information about the website to the search engines. So that when search engine crawlers come, they have no problem in collecting information from the website.