An online casino bonus deposit is a promotional offer that allows players to receive extra funds or free spins when they make a deposit into their gaming account. Typically, these bonuses come in various forms, such as a percentage match on the initial deposit or a fixed amount added to the player's balance. This incentive not only enhances the gaming experience but also increases the chances of winning. However, players should always read the terms and conditions, as wagering requirements and restrictions may apply to these bonuses.