If you are in the bingo room when the game you have a ticket for plays, there will be a pop-up notifying all players of the winner.
If you are logged out when the game plays, you can view your bingo game history by selecting Game History in the Bingo lobby. There, you will be able to see all information about the games you have played, and how much you have won. If you have won, your winnings will be added to your account balance.