Progressive jackpots are typically funded through a portion of the bets placed by players in a particular game or across a network of games. As players make bets, a small percentage is added to the jackpot pool, which continues to grow until a player hits the winning combination. This means that the jackpot accumulates over time, often reaching substantial amounts before it is won. In some cases, multiple casinos may link their games together, contributing to a larger, shared jackpot that can grow even faster due to a wider player base.