Does blocking someone on Facebook automatically unfriend them?

Yes, blocking someone on Facebook essentially unfriends them. Here's what happens when you block someone on Facebook:

1. Unfriend: The person you block immediately becomes unfriended if you were friends with them on Facebook. They will no longer be able to view your profile, posts, or story.
2. Messaging: The individual is unable to send you messages or see your messages in Messenger.
3. No interactions: You will no longer see their posts and updates on your feed, and they won't be able to comment on your posts.
4. Group interactions limited: If you're in the same group as the blocked individual, they are still able to see your comments and posts within the group. However, you will not be notified when they interact with your posts.

Remember, if you unblock the person, you will need to send them a new friend request to become friends again, as Facebook does not restore the friendship as it was before you blocked them.

Learn more:

1. What happens when I block someone on Facebook? | Facebook Help Center
2. Here's what happens when you block someone on Facebook - Business Insider