Google Analytics is one of the best tools available for SEO (Search Engine Optimisation) Marketers. However traditional marketers also look in to these great reports to leverage their marketing knowledge. Google Analytics is all about data. These data helps you to study the past and future behavior of your customers.
I found amazing and still simple infographic about How to use Google Analytics and this will help you to identify main funtion og Google Anaylatics.
Courtesy of: Quick Sprout