In the COIN app, you can collect secret badges and show these off to your friends.
Badges hold no monetary value, they are purely for fun and bragging rights.
A badge in the COIN app is an icon that informs the user of an achievement the user has completed. These are also commonly referred to as Easter Eggs in a game. It is simply a fun in-game feature and does not add any value to your Geomining.
There are 4 puzzle pieces in the app now that will complete your first badge. You can receive a puzzle piece when a specific action is completed with the game. Think outside of the box to complete each act! Keep in mind that a purchase from the app will not grant you a puzzle piece or badge.
An example of a puzzle piece: