Google Play Multiplayer Codes

This is the link of my old game.

https://play.google.com/store/apps/details?id=appinventor.ai_onursagaltici.BoniBalls

Now, I am using this game to try how to do a multiplayer game.

I put 5 achievements and google play gave me the codes (see pictures)

I guess I must implement this codes to the game.

Would you please help me in this matter. 

I have no idea about that codes.