Google Analytics is a web service that offers statistic for website owners. They are able to view data about their visitors in order to know better their sources and behavior to be able to make improvements to their websites.
It offers data about visitor location, time spent on site, page views, operating system, monitor resolution, which browser they use, internet speed and more.
This service is free and offers a Premium upgrade for large amount of data, suitable for big sites and corporations.
It can be integrated with Google Adwords, Google Adsense and Google Webmaster tools account to offer more detailed statistics that could improve conversions.
