What are the best ways to use Google Analytics for track click through rates for ads that are on your site?

I just launched http://heatmap.ca (August 7th, 2013) and it's 100% Free.  I  thought it was about time this type of service was available to all  small to medium sized businesses as a free service.  I am giving  something back to the community. Enjoy! Rob I welcome your feedback and if you have any questions, let me know.  This  is not a limited tool...you get 500,000 clicks per month, Unlimited  Views, you can monitor 100 pages per month across multiple domains. It  generates Click Heatmaps and offers Click and Tap Playback! It works  with Fluid layouts so it will playback a user session if they are on a  Mobile device or desktop computer. If you have media queries that change  the layout on the page, we have a feature where you can enable Dynamic  Content on the page and then apply the Heatmap or Play user sessions to  reveal additional hot points on those dynamic elements (drop down lists,  dialogs, etc)!  Playback overlays a path with arrows (click 1,2,3  etc).  There is even an instant playback speed. The Dashboard runs on  your site and works on a Smart Phone or Desktop computer.  At http://heatmap.ca there is a page of visual analytics including clicks by Country, State,  City, Time of Day, Day of week, Tablets, Phones, etc.

For Adsense, enable Adsense integration. http://www.bharathtech.com/2013/08/adsense-revenue-by-keywords-in-google.html