If I Block Someone On Facebook What Happens [upd] -

Use blocking when you need a clean, immediate break. For less severe situations, start with Restrict or Snooze. And remember: for real-world harassment or threats, always report the behavior to Facebook and consider contacting local authorities.

The blocked person cannot tag you in posts, photos, or comments, nor can they use your name with the "@" symbol to mention you. if i block someone on facebook what happens

The block is mutual in this sense. You will also be unable to visit their profile, see their posts, or search for them. Use blocking when you need a clean, immediate break

Your Messenger chat history with that person will disappear from your inbox. However, the conversation is not deleted from Facebook’s servers. If you unblock the person later, the chat history may reappear (depending on whether either of you has deleted it). The blocked person cannot tag you in posts,

Blocking someone on Facebook is often seen as the "nuclear option" for dealing with harassment, an ex-partner, or a toxic acquaintance. But what exactly happens the moment you click that button? While blocking is effective, its effects are not always intuitive.

If you were friends with the person, blocking them immediately unfriends them. They cannot request to be friends with you again while blocked.