Online casinos offer players the unique chance to win a wide range of progressive jackpots. A progressive jackpot is one that is built on the wagers of every player that places a bet on the game. This means that a small portion of each bet is contributed to the total jackpot, causing it to climb ever-so-slightly over time. Slot machine and poker machine jackpots in the online gambling world can be linked in a wide range of ways, providing players with varying jackpot levels for added excitement.