Why Create a Google Sitemap for your Website
An XML sitemap, which is simply a plain text file on your server, will enables Google, Yahoo and other search engines to locate pages on your website that have been recently updated or added.
google sitemaps
Why You Need To Submit Website Sitemap To Google Webmaster
Q: What are the benefits of submitting a sitemap to Google Webmaster dashboard if your website is already crawled well by Google?