For the most part, Google Analytics tracks Google AdWords data (big surprise!). However, there is one odd quirk about the manner Analytics reports AdWords data—you can only view metrics for an Ad Groups within their respective campaign. In other words, when Lumberg wants metrics like revenue and bounce rates for every AdWords AdGroup, you have to dive into every AdWords Campaign and grab the data for the AdGroups within that Campaign.
This is fine if all of your Ad Groups fall into the same Campaign. But if you’re running a large e-commerce site, chances are you’ve got numerous Campaigns, and numerous Ad Groups within those campaigns