A site map comes standard with every website. You may ask, ‘why do I need a site map”? The purpose of a site map is to aid in the search engine placement of your website. Sitemaps are an easy way for to inform search engines about pages on your website.
Using a Sitemap protocol does not guarantee that your web pages are included in any of the search engines, but it does provide hints to enable web crawlers to do a better job of crawling your site.