Amazon’s advertising business is worth about $125 billion (U.S.), more than Nike or IBM, Morgan Stanley estimates. In addition to knowing what people buy, Amazon also knows where people live, because they provide delivery addresses, and which credit cards they use. Advertisers have long run some targeted campaigns through Amazon’s ad network. So Quartile ran display ads across the web targeting Amazon customers who had bought those two specific product categories. It not only finds those customers, but Amazon automatically shows different ads to different people based on their shopping behaviour.

Source: thestar January 21, 2019 16:18 UTC