Because Facebook collects data even when you’re logged off, you should be aware of what information is getting tracked. Facebook uses tracking cookies that are stored on your computer or mobile device. These cookies are files that contain logged information about your online activity.
How To Stop Facebook From Tracking You [2024 Guide]
https://allaboutcookies.org/how-to-turn-off-facebook-tracking
@ecksmc as does Google, as well as several other websites, apps and hardware.