Candy Crush Friends Saga opens up in great opportunities to play with other Candy fans, by including players outside your normal social group. Whether you choose to save your player profile by linking to your Facebook profile, or if you choose the King profile to save your game - you'll sometimes see other people who may not be immediately familiar.
These players will only see you as another player too, and it means you'll always have a way of seeing how other players in the whole Candy Kingdom are doing and their progress. No other information is shared with them except your avatar.
If you want to be anonymous to other players, you can create a King profile at any time and choose your own nickname and now you can add your own personal image/photo. If you choose to use your Facebook profile, only your first name and your default Facebook image will be seen.
Now you're clear as to who the players are, just jump in and show them how to 'level up'!