When you get the same card more than once, you can exchange it for amazing prizes!
Each duplicate card you get fills the Gift-O-Meter bar based on the number of stars on the card. Once your bar is full, you can exchange your duplicates for coins.
To do so, select the “Album” button in the lobby, then select the gift icon. Choose one of the gifts and enjoy the prize!
If you have a timer it means that you are close to winning a prize!