progressive jackpotWhat Is A Progressive Jackpot? A progressive jackpot is a unique feature that accumulates every player’s bets each time they spin the reels without winning the jackpot.What Is a Progressive Jackpot? A progressive jackpot is a top prize on a gambling game (usually a slot machine) that gets progressively bger until it’s been won. At that point, the size of the jackpot returns to its starting amount