Progressive slots are a type of slot machine where the jackpot increases each time the game is played but the jackpot is not won. When the progressive jackpot is won, the jackpot for the next play is reset to a predetermined value and resumes increasing under the same rule. These games can offer some of the biggest payouts in the casino world because the jackpot can grow to be quite large. Do you have any specific questions about how they work or where to find them?