A no deposit online casino bonus is a promotional offer that allows players to try out a casino's games without having to make an initial deposit. This type of bonus typically comes in the form of free spins or bonus cash, giving players the chance to win real money while exploring the casino's offerings. It's an attractive option for newcomers, as it reduces the financial risk and allows them to experience the gaming environment before committing their own funds. However, players should always check the terms and conditions, as wagering requirements and withdrawal limits may apply.