Sitemap is simply a file that details the structure of the content on a website. It helps both search engines and users about how your website is organized and for the transactions so that people can easily browse the site and to help the search engines to properly index the website.
The 2 Types Of Sitemaps –
XML Sitemaps
HTML Sitemaps
 By having a well-formed Sitemap on your website not only do you improve the UX part, but also the visibility within the search engine results.