A sitemap is a visual or text map of an Internet site - an index of all web pages grouped in sections as they show up on the Internet site. The sitemap is a single file and its presence could have a significant effect on the popularity of your website, especially when you have more content. It will permit site visitors to browse the web pages and find what they need much quicker, which will raise the chance for them to return to the website or to show it to colleagues and friends. The sitemap is also needed for search engines to index your site content better, so that certain pages will be in the results for certain searches, which might not happen without a sitemap even if you have the desired site content. This is especially valid in case you update some pages since the sitemap tells the search engines that they need to crawl the internet site again to index the latest content. Having a sitemap nowadays is fundamental rather than an optional attribute for any successful site.