Notifying Friends When New Friend Joined?

1. Does Facebook notify friends when you add a friend?
2. Do friends get notified when you join a group?
3. Why do I get notifications when a friend comments on another friends post?

Does Facebook notify friends when you add a friend?

Your Facebook friends will no longer be notified when you add someone new to your friend list.

Do friends get notified when you join a group?

When joining a group, whether private or public, your Facebook friends might see that you've joined it. Some groups are secret and can't be searched for, in which case a qualifying group member has to invite you.

Why do I get notifications when a friend comments on another friends post?

If you turn on notifications for a post, you'll get notified whenever someone comments on the post. You won't get notified when someone replies to a comment. Go to the post that you'd like to turn notifications on or off.