Business Insider - The hottest new trend in adtech is "RTB," or real-time bidding. And it's often a way to rip off advertisers, according to Konrad Feldman, CEO of Quantcast, one of the larger players in the RTB market. In some cases, "they're actively being gamed," Feldman told me recently when we discussed the state of online advertising and the clients that buy it. RTB, or "programmatic" advertising, is a way for advertisers to target or "retarget" users on the web with cookies. Basically, if you looked at some shoes on a web shopping site but didn't buy them, you might find yourself being retargeted with shoe ads next time you look at Facebook. Your web browser will tell advertisers that you went to the shoe site, and when your Facebook login is activated advertisers get an instant signal â shoe shopper has arrived in Facebook! â and shoe ads appear in your news feed. The advertiser hopes you click on that ad and actually buy the shoes. About $5 billion in spending will go
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