Ad Targeting Is Hard

TechCrunch writes, Editor’s note: Benjy Weinberger is the engineering site lead for foursquare’s San Francisco office. He previously worked on infrastructure and revenue engineering at Twitter, and before that on search and ad engineering at Google for eight years. Microsoft recently announced that it’s taking a huge $6.2 Billion writedown over the failed aQuantive acquisition. This news, and the scrutiny of Facebook’s business model following their IPO drama, show that, in online advertising, it’s all about the targeting. As this Reuters analysis explains, there’s so much...

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