Why RTP Is Important RTP is one of many important factors to consider when choosing which games to play. Simply put, games with high RTPs give you a better chance to win at real money casinos. This is especially true for pg slot players that plan to play a game for an extended period of time. RTP is calculated with long-term gains in mind. Your RTP should improve over time. For instance, if you only play 10 hands your RTP will likely be lower than if you play 100.