Google Analytics is a great tool for web analytics. You can use it to track visitors to your websites with multitudes of metrics, reporting, and analysis tools. Google AdSense on the other hand is very good at tracking your Adsense earning.
While both excels at their job, it gets better as you can get the best of both by viewing your Google Adsense data in Google Analytics. This enables you to view page-level performance report of your Adsense earning among other things as this is only possible by combining Analytics data and can't be done by Adsense alone.
You can view your adsense data in Analytics by following these steps;
ADMINlink at the bottom of the left sidebar.
Admininterface should look something as the followings with sections for
NEW ADSENSE LINK.