Creating a search engine spider friendly sitemap of your website would help the search robots to navigate through your site easily and crawl the webpages effectively.
XML sitemaps list all the URLs of your website for the search engine spiders, as well as provide information like how often the page is updated, the date on which the page was modified. The relative important of each page is also given in the XML sitemap.
XML sitemaps can speed the indexing and crawling process of your website pages, assist in your rankings and improve your existence on the internet.