There are a range of tools available to help us kind of find tune what we see. But facebook has its own algarithm, which operates under its own principles. And it can still figure out things that you like based on how you behave on book and other factors. Even if you've turned off all these categories,. it still can figure out that this person is interested in, or seems to engage with health relatedThings such as cancer-related topics could be targeted by the social network.