5/16/2014

How does a Target ad land on Wal-Mart's home page? One way is through browser extensions that can "inject" ads onto sites. These ads enter the ecosystem when an ad-tech company buys the space then sells it to other exchanges where brands buy inventory. "This is an industrywide problem that needs attention from all advertisers and definitive action from suppliers," said Amy Furman, marketing director at Geico.

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