A cashback bonus is a reward given to a player by the online casino after a period of wagering more than what was deposited. This type of bonus is offered to players as a way to give them something back in the form of playing credit for every amount of money that they have wagered in the casino. It can be used to play any game offered by the casino, or even withdraw it. This gives players the opportunity to recoup any losses they may have incurred while playing.