Facebook Algorithm

Hey, can you explain me about FB algorithm / help me find where I can learn about that?
tnx.

FB algorithm ? about what exactly ? pages ? groups ? profile posts etc. ?

profile, groups if you can help it will be great
FB block all my new acc after couple min's even I use phone numbers..+ I want to make a group and get there traffic but correctly without take the risk for a ban or so on..and continue to spam.