Google Analytics
Also known as: GA
Google Analytics is a Web application for measuring and analyzing Web site visits. Analytics is one of the most comprehensive statistics packages available for free. After adding a piece of code to the website, Google Analytics measures the usage of a site.
Through the extensive Analytics interface, very diverse and specific statistics can be retrieved. Think of the amount of unique visitors, visits and page views in a particular website. These figures can be retrieved at both the website level and the page level. Analytics also shows key entry and exit pages and is able to measure conversions and events within a website. This makes Google Analytics a popular tool for online analysis and optimization.