The purpose of XML sitemaps are to help tell the search engines about all of the pages on your website. It also helps to tell the search engines which pages you think are most important. (They won’t necessarily listen to you, but you can tell them.)
I recently found a great website that will create XML sitemaps for websites of up to 500 pages! And the best part is, it’s absolutely Free! You can by the program they made as well if your site has more pages, etc.
Check it out: