The shocking details you reveal about yourself when you ‘like’ things on Facebook

How well do you think your Facebook FB, -3.34% account knows you?

A data firm hired to support President Donald Trump’s 2016 election campaign allegedly harvested private information from 50 million Facebook users without their permission. The Guardian first reported the data was collected through an app called thisisyourdigitallife, which also collected data on the test-takers Facebook friends.

Facebook said it suspended the accounts of two people who worked with Cambridge Analytica, a data firm with ties to Trump’s election campaign. The biggest social media company in the world, with 2.2 billion monthly active users, said that Cambridge Analytica broke Facebook’s policy on how third parties can obtain and use data and Facebook CEO Mark Zuckerberg apologized.

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