Facebook has never been particularly good at prioritizing your privacy. Your powers its business, after all. But recent revelations that a firm called Cambridge Analytica harvested the personal information of 50 million unwitting Facebook users in 2015 has created new sense of urgency for those hoping for some modicum of control over their online life. If you ever needed a wake-up call, this is it. Facebook offers a fairly robust set of tools to control who knows what about you.

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