February 4, 2014
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4:14Now PlayingSince it was launched in 2004, Facebook has developed into the one of the world's most important social networking platforms. Today, more than a billion people a day use it. But with their "likes," users reveal much more than they think.What began as a student network at Harvard University has developed into a perfect advertising machine. For businesses, media enterprises and political parties, it's now considered the number one internet marketing platform. The most important instrument is the "like" option, introduced in 2009. With it, the network collects valuable information. Polish researcher Michal Kosinski has studied how extensive this "deep data" really is. For more go to
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