Pari Mutuel Urbain (PMU) is a French betting system primarily focused on horse racing. It allows bettors to place wagers on the outcome of races, with the total amount bet pooled together. The winnings are then distributed among the winners after deducting a percentage for the operator and other expenses. In this system, all bets are placed into a common pool, and the odds fluctuate based on the amount wagered on each horse. This means that the more popular a horse is, the lower the potential payout for winning bets. PMU is a significant part of France's gambling culture and supports various horse racing events.