Free Spins Bonuses are a special type of online casino bonus used to reward players who like to spin the reels of online slots games. When a player participates in this type of bonus, they receive a certain number of slot spins for free. This can be awarded as a part of the welcome bonus, reload bonuses or even no deposit bonuses. The number of spins can vary depending on the promotion, but is usually anywhere between 10 and 50.