The wagering requirement (also called playthrough or rollover) is the most critical rule in any casino bonus. It is a multiplier that indicates how many times you must bet the bonus amount before those funds, and any winnings derived from them, become withdrawable cash.
These requirements exist to ensure that bonuses are used for entertainment and gameplay rather than as a direct withdrawal mechanism. Without wagering, players could claim a bonus and immediately cash it out, which would make the offering unsustainable for the operator.
There are two common types of wagering: Bonus-Only (where only the rewarded amount must be wagered) and Deposit + Bonus (where both your deposit and the bonus must be wagered). The latter requires significantly more betting volume to clear.
You can track your progress in real-time via your account dashboard. The exact multiplier for every specific offer is clearly displayed alongside the promotion in your account before you click "Claim."