A sitemap is a visual or text map of a site - a short list of all web pages arranged in sections as they appear on the Internet site. The sitemap is a single file and its presence may have a substantial effect on the popularity of your site, especially if you have more content. It will make it possible for visitors to go through the webpages and find what they need faster, that will raise the possibility for them to return to the Internet site or to share it with colleagues and friends. The sitemap is also essential for search engines to index your content better, so some pages will be in the results for specific searches, which will most likely not happen without a sitemap even if you have the needed content. This is especially valid if you update some webpages since the sitemap informs the search engines that they have to crawl this Internet site again to index the latest content. Having a sitemap nowadays is a necessity rather than an optional attribute for any thriving site.