How Can I Tell If My Facebook Info Was Shared with Cambridge Analytica?

Visit this Facebook support page and log into your account. Look for the Was My Information Shared? section, and it will tell you whether you or any of your friends used the now-banned quiz app called "This Is Your Digital Life," which scraped friends' personal information and then passed it to Cambridge Analytica, a data consulting firm linked to the 2016 presidential campaign.

In addition, all 2.2 billion Facebook users will receive a notice titled "Protecting Your Information," seen at left in the graphic below, with a link to see what apps they use and what information they have shared with those apps. If they want, they can shut off apps individually or turn off third-party access to their apps completely.