A "bet-per-win-line" is a concept that finds use in many online slots. In this case, players can spread their bet over a certain number of win lines. The bet per win line determines how much a player is willing to bet on each respective win line. The higher the bet per win line is, the greater the risk and the possible winnings involved. You should consciously decide on a bet per win line that best suits your budget and offers you a pleasant gaming experience.