When you play progressive jackpot slot machines you should know how they work. The slots set aside some of their revenue from each spin that is put towards a big jackpot. They offer smaller, infrequent payouts compared with regular slot machine games. The one big advantage progressive slots have is that jackpots are much more then what you would find playing regular slots.
One important rule to remember is that all progressive machines require that you bet the maximum coins and lines to be eligible for the big jackpot. If you can't afford to spend that much on the machine find a cheaper progressive slot or stick with the regular ones. Another tip is to look around for the machine with the current highest jackpot among similar machines. Since most progressive start at the same amount, so that means the higher the jackpot the longer it has been since the last jackpot hit which means it will probably hit before smaller progressive jackpots.
You can find more info on online progressive slots and play the game you'll like.