Sitemaps allow a webmaster to provide search engines with a list of URLs on a website that are available for crawling; this can be especially helpful if you’re attempting to increase your page rank. In addition to providing the list of URLs, sitemaps also supply information about each individual URL, such as relevancy to the website, update times, and change frequency.
Since the internet is a pretty crowded place, it is incredibly important to take the proper steps to ensure your site is getting the highest amount of traffic possible. If your website is just getting started and you are looking to increase traffic, creating a sitemap can assist search engines by providing insight into pages that are new, recently updated, or not immediately accessible through the browsable interface.