Google Wants to Dominate Madison Avenue, Too - New York Times

Google has created what it says is one of the most sophisticated artificial intelligence systems ever built. In a fraction of a second, it can evaluate millions of variables about its users and advertisers, correlate them with its potential database of billions of ads and deliver the message to which each user is most likely to respond.
Because of this technology, users click ads 50 percent to 100 percent more often on Google than they do on Yahoo.
Thank you Terry B.