Brett_Tabke - 3:58 am on Jun 20, 2009 (gmt 0)

[blogs.wsj.com...]

With the new ads, Google is mixing up its pricing model as well. Unlike Google’s standard search ads, where advertisers generally pay every time users click on their ads, Google will charge advertisers for product ads only when a user makes a purchase. Advertisers set the commission they are willing to pay, and Google decides which products ads to display based on the commission, how well the ad matches a query, and how often people click on the ads, among other things.