A jackpot is basically the highest form of winning in a slot. Not every slot features a jackpot, but if you hit it, you’ll win the main prize right then and there. Before a jackpot is distributed, you’ll see a jackpot reel. You then spin it and should it end up on “Jackpot”, you’ll receive the entire sum of the winnings. But you could also end up winning just a portion of the jackpot, depending on where the reel lands for you.