A sitemap is a visual or text map of an Internet site - a short list of all web pages arranged in sections as they show up on the website. The sitemap is a single file and its presence could have a crucial impact on the popularity of your site, especially when you have a lot of content. It will make it possible for visitors to look through the webpages and find what they need faster, which will increase the chance for them to come back to the site or to share it with colleagues and friends. The sitemap is also needed for search engines like google to index your site content better, which means that some pages will be in the results for particular searches, which may not happen without having a sitemap even when you have the necessary content. This is especially valid in case you modify some web pages since the sitemap tells the search engines that they have to crawl the website again in order to index the latest content. Having a sitemap today is fundamental rather than an optional feature for every profitable Internet site.