MikeNoLastName - 10:46 pm on Nov 23, 2011 (gmt 0)

When you all calculate your "CTR" do you look at Clicks per page (which could have 1-3 ad blocks), Clicks per ad block (which could have 1-5 ads) or Clicks per ad, which would ideally be the lowest common denominator. Which does G look at to determine if your site CTR is too high? Each is manipulable to an extent in various ways, but which to manipulate?