Progressive jackpots are major fun to play and they are even better to win because the winnings often become very large. So what are progressive jackpots? Progressive jackpots are slot machine games where there are jackpots that keep on growing as the players play the game at various casinos. There is always a fixed amount of money after which the games become the jackpot and from that point onwards every coin has a positive chance of winning.The working principle behind this is that every coin that is put into the slot machine contributes a small fraction to the jackpot. Since these games are played on networks of slot machines, there are many players playing simultaneously over the network. This ensures that the jackpot grows quickly over time.Playing these slot machines online can be addictive and contrary to what many people think, slot machines are the biggest attractions in the casinos and not the table games. That is because people perceive these games as having a real winning chance over the other games that are believed to have the odds in favor of the house.There are several networks online that run progressive jackpots and sometimes those jackpots reach figures in multi-millions. People have won upwards of 5 million dollars on these games and that is what makes them so lucrative, the chance of becoming millionaires.Playing progressive jackpot games online is simple enough; first you have to choose your favorite casino. You can choose on the basis of networks. Some networks are better than other in certain features but it is usually a matter of personal taste as to which network is preferred by whom.The network games that have a larger number of casinos are usually preferred because the number of participating casinos is directly related to how fast the jackpot is moving up. However, the greater the number of casinos, the higher the dilution of odds because you are competing against more people to win the game.This is why the choice of a slot machine game is relative to the people who are playing and some prefer one to the other. Choosing an online casino is thus completely up to you.Find a casino that is legal for you to play and win at and sign up with your required information. Once you are done signing up, you can proceed to playing your favorite slot machine game.There is a common strategy used by professional gamblers to make money from slot machines. This is a legitimate strategy and involves some calculations. The trick is to play at a time when each coin you put in has a positive value. This happens when the jackpot has just reached its minimum value, say $1000. You should start playing when it reaches 3x the minimum, i.e. at around $3000 dollars. This is when you have a better chance of winning. But it is still not a huge margin, so just remember that you are out to have fun.