A lot of promotions have wagering requirements that specify how many times you have to use the bonus money before you can take your winnings out. Also, some games might have varying contributions to fulfilling these criteria; for instance, some slots might meet all of the requirements666e app download, while others might only contribute 50% or less. Knowing these subtleties will enable you to choose bonuses wisely and apply them to your gameplay strategy. Prior to beginning to play, every online slot player should be aware of two important concepts: volatility and return to player (RTP). RTP is the percentage of money wagered that a slot machine is designed to give back to players over time. An RTP of 96 percent, for example, indicates that, in theory, players will receive $96 in winnings over a long period of time for every $100 wagered on the slot machine.