Progressive betting systems are strategies used in gambling where players adjust their bets based on previous outcomes. The idea is to increase bets after losses and decrease them after wins, aiming to recover losses or maximize profits. Common examples include the Martingale and Fibonacci systems, which provide structured approaches to betting. These systems can be applied to various games, such as roulette or blackjack, and are popular among gamblers seeking a methodical way to manage their bankroll. However, while they can create a sense of control, they do not guarantee success and can lead to significant losses if not used carefully.