New York,
Get ready to find out if your Facebook data has been swept up in the Cambridge Analytica scandal. Starting Monday, the 87 million users who might have had their data shared with Cambridge Analytica will get a detailed message on their news feeds.

Facebook says most of the affected users are in the US, though there are over a million each in the Philippines, Indonesia and the UK.

In addition, all 2.2 billion Facebook users will receive a notice titled “Protecting Your Information” 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.

CEO Mark Zuckerberg acknowledged that he made a “huge mistake” in failing to take a broad enough view of what Facebook’s responsibility is in the world.