A sitemap is a file which includes the different pages of a website and the path to them through the sections of the website. The web pages can be organized visually or as plain text and this sort of a file is extremely useful for 2 reasons. The first one is that it makes it faster and easier for the site visitors to find a particular page they need, so they can navigate your website better and faster, that in turn will improve their user experience and it will be more likely that they will revisit the Internet site or will recommend it to other people. The second reason is that a sitemap enables search engines to index your content better, especially if it's updated, so if users are searching for particular content, it is much more likely that they'll come across your site as it will be listed higher in their search results. If 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 the website.