A sitemap is a file which includes the different pages of a site and the path to them through the sections of the website. The webpages can be sorted visually or as plain text and this kind of a file is quite useful for two reasons. The first is that it makes it much easier for the visitors to locate a specific page they need, which means that they can navigate your website better and much faster, that in turn will increase their user experience and it'll be more likely that they will return to the website or will recommend it to other people. One more reason is that a sitemap permits search engines to index your website content better, especially if it is updated, so if users are looking for specific content, it's much more likely that they will find your Internet site because it will be listed higher in their search results. In case your Internet site is not indexed properly, it might not show up for some searches, so even in case you have what people require, they will simply not get to your Internet site.