[dropcap]G[/dropcap]oogle Webmaster Tools is a no-charge web service by Google for webmasters. It allows webmasters to check indexing status and optimize visibility of their websites.
It has tools that let the webmasters:
1.Submit and check a sitemap
2.Check and set the crawl rate, and view statistics about how Googlebot accesses a particular site
3.Generate and check a robots.txt file. It also helps to discover pages that are blocked in robots.txt by chance.
4.List internal and external pages that link to the site
5.See what keyword searches on Google led to the site being listed in the SERPs, and the click through rates of such listings
View statistics about how Google indexes the site, and if it found any errors while doing it
6.Set a preferred domain (e.g. prefer seolearn.in over http://www.seolearn or vice versa), which determines how the site URL is displayed in SERPs