Google Analytics shows you how people found your site, how they explored it, and how you can enhance their visitor experience. Improve your website return on investment, increase conversions, and make more money on the web.
With over 80 reports, your free Google Analytics account will track visitors through your site, and will keep track of the performance of your marketing campaigns - whether they're AdWords campaigns, email campaigns, or any other advertising program. With this information, you'll know which keywords are really working, which ad text is the most effective, and where your visitors are dropping off during the conversion process. Don't be fooled by the fact that this functionality is available to you for free - Google Analytics is a full-featured, powerful analytics package.
Google Analytics