Apparently it is an Amazon Price tracker. You add the product that you want, and it will watch for the price to decrease and then let you know. You can also see a price history of the product. Never knew this existed. Just wish I had known about it before the holidays. I'm going to sign up, and input all the regular items I buy from Amazon, so I know when it's cheaper. This might be something that can really save me money, as I know Amazon prices change all the time.