What is the use of google webmaster tool?

[Roy Francis]

Hello Friends, Tell me what is the use of google webmaster tool.

[-pops-]

Have you considered asking Google?

[ɹəuəllıʍ ʇɐb]

Google says

Improve your site's visibility in Google search results. It's free.

Google Webmaster Tools provides you with detailed reports about your pages' visibility on Google. To get started, simply add and verify your site and you'll start to see information right away. Learn more »

• Get Google's view of your site and diagnose problems
  See how Google crawls and indexes your site and learn about specific problems we're having accessing it.
  
• Discover your link and query traffic
  View, classify, and download comprehensive data about internal and external links to your site with new link reporting tools. Find out which Google search queries drive traffic to your site, and see exactly how users arrive there.
  
• Share information about your site
  Tell us about your pages with Sitemaps: which ones are the most important to you and how often they change. You can also let us know how you would like the URLs we index to appear.
  

[Marchal]

Hi,

Google Webmaster Tools is Google's free service for webmasters. See your site as Google sees it, find out any problems we had crawling your site, and share info with us that will help improve your site's visibility in Google's search results.

Your client application can use the Webmaster Tools Data API to view sites in your Webmaster Tools account, add and remove sites, verify site ownership, and submit and delete Sitemaps.