The highest popularity among players and the most profitable for the casinos are the Progressive slot games. The games exist that have progressive jackpot for the top win. The progressive jackpot gets bigger as a player in any country plays that progressive slot at any online casino. It is so because a little share from every bet joins the progressive jackpot. As the players play the same progressive in online casinos all over the world, the jackpot becomes higher and higher until someone wins it.
The players can see the current size of any jackpot over the slot reels. To have right to win a progressive jackpot, the players must follow certain rules that most progressives set. But to be honest the chances of hitting a progressive jackpot are not really high.