Google Webmaster Tools
Google 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:
l Submit and check a sitemap
l Check and set the crawl rate, and view statistics about how Googlebot accesses a particular site
l Generate and check a robots.txt file. It also helps to discover pages that are blocked in robots.txt by chance.
l List internal and external pages that link to the site
l Get a list of broken links for the site
l See what keyword searches on Google led to the site being listed in the SERPs
l View statistics about how Google indexes the site, and if it found any errors while doing it
l Set a preferred domain, which determines how the site URL is displayed in SERPs
Google Webmaster Tool versus Google Analytics
Google Webmaster Tool shows traffic for each keyword separately; it gives more information about website performance according to Google search query. This tool does not cover search results from other search engines, such as Bing, Yahoo, or Baidu.
While, Google Analytics shows total traffic for a website, such as clicks to your site, regardless of where they came from and what search terms were used. It shows whatever search terms brought up your site in the listings.
Plus points of Google Webmaster Tools
Google Webmaster Tools can be a powerful ally. But, if you make a mistake or put this power in the wrong hands, it can mean trouble for your search engine optimization.
It is very important to point out that some of these things are more detrimental than others. Also, there could be multiple articles written about each of these tools and reports.
There are a lot of tools that can be in many ways to benefit from these tools and reports, but getting started is the first step!