Gaming slots offer their players not just an opportunity to try their luck and enjoy an interesting plot. Almost every machine is endowed with many different bonuses that encourage their players. With the help of bonuses, you can increase your winnings several times; this opportunity encourages and sets you up for a successful outcome. One of the most desired feature of the slot is the opening of the bonus round. Most often, developers introduce bonus free spins of the slot machine. Free spins is an option that allows the player to play without placing a bet.