Google Webmaster Tools provides very important information about a website such as
1) The number of impressions a website has received during a certain period of time.
2) The rank for a certain keyword or phrase in Google.
3) The number of clicks a website has received through the search engine results page.
4) Other websites that are linking to your website/blog.
5) The internal links to your website.
6) If Google has detected any Malware on your website.
7) Crawl Errors (issues Google has encountered while crawling your site).
8) Crawl stats (the number of times and the number of pages of your site crawled by Google).
9) Google Webmaster Tools also points out any problems with the content of the site such as duplicate content, problematic title or meta tags.
