A wagering requirement (also known as playthrough or rollover) is a multiplier that determines how much you must bet before bonus funds turn into withdrawable cash. These requirements exist to prevent players from claiming a bonus and immediately withdrawing it without actually playing the games.
There are two primary structures: Bonus-Only wagering, where only the credited bonus amount must be rolled over, and Deposit + Bonus wagering, where the sum of both the deposit and the bonus must be bet. The latter results in a higher total amount of betting required to unlock funds.
You can track your progress in your account dashboard. The specific multiplier for any given offer is clearly displayed alongside the promotion in the "Promotions" section of your account. Once the total bet amount reaches the required threshold, the remaining bonus balance is converted to real money.