From internal leaks within the company as well as external analysis, the tip of the iceberg behind Facebook’s spyware empire is exposed. Take a look to better protect yourself when you’re not even on the platform: https://simplifiedprivacy.com/facebooks-corrupt-off-platform-surveillance/
Ok, so if I visit a travel site with a Like button, then Facebook knows someone visited that site.
Later if I visit a sports site with a Like button, then Facebook knows someone visited that site too.
But since I don’t let Facebook store cookies on my browser, Facebook still can’t link the first visit to the second one. Or link those visits to any future sites I visit. So how it can serve personalized ads on them?
It can link first by IP address, and then by fingerprinting.
Best to use unlock origin etc. to block all those little buttons. Don’t even connect to their server