No deposit bonuses and free spins are popular promotional offers in online casinos, allowing players to try games without risking their own money. A no deposit bonus provides players with a small amount of bonus cash upon registration, while free spins grant a set number of chances to play specific slot games. These incentives attract new players and enhance the gaming experience, enabling them to explore various games and potentially win real money without an initial investment. However, players should always check the terms and conditions, as wagering requirements may apply.