Google Webmaster Tool and Google Analytics?

Google webmaster tool :-

Google webmaster tool 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:

Submit and check a sitemap

Check and set the crawl rate, and view statistics about how Googlebot accesses a particular site.

Generate and check a robots.txt file. It also helps to discover pages that are blocked in robots.txt by chance.

List internal and external pages that link to the site

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.

Google Analytics:-

Google Analytics is a free Web analytics service that provides statistics and basic analytical tools for search engine optimization (SEO) and marketing purposes. The service is available to anyone with a Google account. Google bought Urchin Software Corporation in April 2005 and used that company’s Urchin on Demand product as the basis for its current service.

Google Analytics features include:

• Data visualization tools including a dashboard, scorecards and motion charts, which display changes in data over time.

• Segmentation

for analysis of subsets, such as conversions.

• Custom reports.

• Email-based sharing and communication.

• Integration with other Google products, such as AdWords, Public Data Explorer and Website Optimizer.

Google Analytics is geared toward small and medium-sized retail websites. The service has limitations that make it less suited to more complex websites and larger enterprises. For example, the system collects data through a JavaScript page tag inserted in the code of pages the user wants to collect data on. The page tag functions as a Web bug to gather visitor information. However, because it’s reliant on cookies, the system can’t collect data for users who have disabled them. Google also uses sampling in its reports rather than analyzing all available data.