It is a Firefox Add-on. It gives you details on adwords campaigns from the competition, like how much a specific advertiser is paying for a keyword/phrase. The video will be able to explain it better. There is a free and paid version. I only have the free version and it works great for me. Here is a link to the product with their video explaining in detail about the product. Yes, it is my affiliate link. I get a couple of pieces of some software if people download the free version from my link. http://www.ppcwebspy.com/downloads/?xc8846