How to create Google site map / How it works

google sitemap- google sitemap is a webmaster tool that show you google's view of your site.

how it helps :-

Crawl info: You can make sure we have access to your site, and see when Googlebot last visited. You can also view URLs that we’ve had trouble crawling and why we couldn't crawl them. This way, you can fix any problems preventing us from indexing all of your pages.
Robots.txt file validation: See if we’re having trouble with your file, and test out changes to that file before you change it on your server.
Website content: View top content from your site and see the words that other sites use to link to it.

what is a site map:- site map is a list of all the pages on the website. you can either submi txt sitemap or xml sitemap to the search engine.

How it works:- it helps the search engine like google , Yahoo , Msn to cache the pages of the website.

it boost your ranking- it have no role in Ranking position. but it helps in caching the pages.

how to create sitemap:- you can create your sitemap in a minute by using the tools like
xml-sitemaps.com.