Tree Maps: easily digestible & visual AdWords data.
Treemaps is a relatively new feature in Analytics that allows you to quickly identify possible account errors at a top line level. This feature works by showing the user rectangles of data that are colour coded to make identifying issues easier. For example, I have segmented my data by clicks & bounce rate, if we look we can see the campaigns that have a low bounce rate in green and the campaigns that have a higher bounce rate are in red;
This allows the user to quickly identify what campaigns they need to investigate.
You have various different metrics you can choose from so you can analyse lots of different data this way, this will make campaign optimisation easier as you can identify areas that need work in a very easy to read way.
Hope this helps out!