A comparison between two display media research tools you might consider using to boost your advertising campaign results.
http://www.whatrunswhere.com and http://www.mixrank.com
Each have their plusses and minuses. I think having both will be of most benefit, but if you could only choose one and the US market was the only market you were interested in and the Google Display Network was the only traffic source then Mixrank would probably win a head to head.
But, both add a lot of value and easily pay for themselves.
