When you follow someone, they appear in your Following list and you see their posts in your feed. When they follow you back, you become friends. Friends are simply people who follow each other.
How do I follow someone?
Open their profile and tap Follow. If they've set their posts to private, your follow becomes a request they have to approve. To stop following, open their profile and tap Unfollow.
Where do I see my friends and followers?
Open your profile to see your Followers, Following, and Friends lists. Your Friends list shows people who follow you and whom you follow back.
How do I find people I know?
Search for their username, or use Find Friends to sync your phone contacts and see which contacts already play. You can turn off contact syncing at any time, and you can choose whether friends can find you this way.
How do I remove a follower?
Open your Followers list and remove them, or block them. Blocking also stops them from messaging you or entering your rooms. See How do I block or mute someone?
Why can't I follow more people?
There's a limit on how many players one account can follow. If you see "You can't follow any more users," unfollow some accounts first. If you see "Unable to follow user," that player may have blocked you.
Why don't my counts match?
How do I make my profile more private?
Privacy options, like making your posts private, are in your privacy settings. See How do I make my profile private?