Each and every slot player should be aware of two important concepts when selecting a game: volatility and return to player (RTP). The term RTP describes the reel king slotsproportion of wagered funds that a slot machine is designed to give back to players over time. A slot machine with a 95 percent RTP, for instance, should eventually yield $95 for every $100 wagered. Although this number does not ensure specific results, it does offer information about the game's potential payout.