A sitemap is a file that includes the different pages of a website and the way to them through the sections of the site. The webpages can be arranged visually or as simple text and this kind of a file is very useful for two reasons. The first one is that it makes it faster and easier for the site visitors to find a particular page they need, which means that they can navigate your Internet site better and quicker, that in turn will improve their user experience and it'll be more likely that they will return to the site or will recommend it to other people. Another reason is that a sitemap allows search engines to index your content better, particularly if it is updated, so if users are searching for certain content, it is much more likely that they will come across your Internet site because it will be listed higher in their search results. In case your site is not indexed well, it may not appear for some searches, so even when you have what people require, they will simply not get to your site.