A sitemap is a visual or text map of a website - an index of all webpages organized in sections as they show up on the website. The sitemap is a single file and its presence could have a considerable impact on the popularity of your website, particularly if you have a lot of content. It will permit site visitors to browse through the web pages and find what they need faster, which will increase the possibility for them to come back to the website or to show it to friends and colleagues. The sitemap is also needed for search engines like google to index your site content better, so some pages will be in the results for specific searches, which may not happen without a sitemap even when you have the needed website content. This is especially valid when you update some webpages as the sitemap informs the search engines that they have to crawl this Internet site again to index the latest content. Having a sitemap these days is fundamental rather than an optional attribute for any profitable website.