With a free spins bonus, players get a specific percentage bonus on top of their deposits, as well as many free spins. They allow players to play with free spins or money on the casino slots.
Additionally, players can play one or more games for free and enjoy keeping the profits.
Free spins bonuses are restricted explicitly to slot games; they are the only games where players literally spin anyway! Additionally, slot games form over 90% of any casino's titles. These offers allow players to play their favorite games a certain number of times, without having their betting account debited. They are thus able to risk more.