You’ve heard a lot about the data Facebook gathers on its users.

In “The Data Dilemma,” examine what Facebook knows, and how it knows it – from the platform’s use of so-called “shadow profiles,” to the main ways Facebook tracks you on the web, even when you’re not on Facebook.

This digital video accompanies FRONTLINE’s new, two-night investigation of Facebook. For more on Facebook, data, and privacy, watch The Facebook Dilemma.

Patrice Taddonio, Senior Digital Writer, FRONTLINE

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@ptaddonio