Say STOP to SEO regression with Oseox Sitemap & Oseox Monitoring Is having a Google Sitemap essential to be well ranked ? by Aurélien Bardon Definitely not. A Sitemap is an XML format file that lists the web pages of your website and provides some information on pages such as their update rate. This kind of file is also supported by Yahoo and Bing. Related posts: Is the SEO of website better if it is on a dedicated server rather than on a mutualized server How to delete a web page indexed by Google ?