I have all my off-site banner ads correctly campaign tracked/tagged but I want to know what metrics I should be looking at in the GA for the closest comparison to the ad servers clicks. I am pretty sure it wouldn't be Visits but I also see there is PageViews and UniquePageViews. My GA data is coming in way off from what the ad server manager people are telling my clicks are for said banners on their site. My other question is what type of percentage are other people seeing there data being off?