A sitemap is a file that contains the different pages of an Internet site and the way to them through the sections of the website. The web pages can be organized visually or as plain text and this kind of a file is really useful for 2 reasons. The first one is that it makes it faster and easier for the visitors to discover a particular page they need, so that they can navigate your site better and a lot quicker, which in turn will increase their user experience and it will be more likely that they will revisit the site or will recommend it to other people. One more reason is that a sitemap makes it possible for search engines to index your site content better, particularly when it is updated, so if users are searching for specific content, it is much more likely that they'll come across your website since it will be listed higher in their search results. If your site is not indexed effectively, it might not appear for some searches, so even if you have what people want, they will not get to your Internet site.