Progressive betting is a wagering strategy where the bettor increases their stake after a loss and decreases it after a win. This approach aims to recover previous losses while capitalizing on winning streaks. It is commonly used in games like roulette and blackjack. There are various types of progressive betting systems, such as the Martingale system, where the bettor doubles their stake after each loss. Alternatively, the Fibonacci system uses a sequence of numbers to determine bet sizes. While these strategies can be exciting, they also carry risks and do not guarantee profits.