As Facebook explained, other companies post information about your internet activity on social networks on their websites. Facebook uses this information to display customized ads. With off-Facebook activities, you can view and delete this information. You can even choose to separate all future off-Facebook activity from your account or only from certain apps and websites.
Today's news relates to the next decade of Facebook's "more privacy protection," and the company admits it has a lot of work to do in this regard. These updates include a prompt that prompts every Facebook user to check their privacy settings, and "sign-in notifications" that alert you when your Facebook account is used to sign in to third-party apps.
Almost two years have passed since the Cambridge Analytica privacy scandal hit Facebook and sparked a debate about how large corporations should process and monitor user data. Following the event, Facebook made announcements after announcing changes in privacy, security tools, and promises to improve its overall ability to protect user information.
Regarding the new off-Facebook activity tool, the company welcomed "conversations with data protection professionals, policy makers and other companies about the further development of such tools".