Progressive Slots, or Jackpot Slots, are the ones who let you qualify for a big prize, distributed to the winner of it, from a pool that yields loosings over time. The more players play the game the bigger that prize pool becomes. Usually, there are two kinds of jackpots. The local one and the Network one. The local one is usually offered by an online casino that gathers loosings from the players played in this casino. The network one, is offered by the software provider of the game (Netent for example) and its amount is life changing.
Usually the jackpot win comes after a bonus game or a 5 of a kind of the highest ranked symbols of the game. Today’s games offer more than one jackpots, making it easier to win but the mega jackpot is the one that can give you millions.