In online Roulette, understanding probability helps you assess the likelihood of different outcomes and make more informed bets. Outside bets, like red/black or odd/even, have nearly a 50% chance of winning, making them safer, though with smaller payouts. Inside bets, such as straight numbers, have lower probabilities but offer higher rewards. By knowing the probability of each bet type, you can decide whether to aim for consistent small wins or take bigger risks for larger payouts.