The most popular bets are usually ‘outside’ bets, such as red/black, odd/even, and high/low. These bets have a higher chance of winning, but with an even payout (1:1). You can also place a column bet, which covers all 12 numbers in one of the three vertical columns and pays 2:1, or a dozen bet, which covers one of the three groups of twelve numbers (1-12, 13-24, 25-36) and also pays 2:1.
‘Inside’ bets have a lower chance of winning, but with a higher payout. These include betting on a single number, two adjacent numbers on the wheel, or on ‘corners’ of the roulette table. There are multiple variations, so determine your preference before placing your bet!