Very popular type of slot machine with the biggest jackpot payouts, progressive slots are a number of machines operating in a single network that uses a portion of the money inserted to continuously increase the jackpot until it is won.
Multiple Pay-Lines
These slot machines have more than one pay-line. The most common of these machines have three pay lines; one in the middle of the screen, one on top of it and one below it. If you spin a winning combination that lands directly on any of these lines you might win. The twist is, is that you can only activate all three lines if you insert the maximum number of coins into the machine. So if you insert only one or two coins (on a three coin max, three line machine) and you hit a winning combo on the top line, you may not win anything. But if you had entered three coins, no matter which line you hit, you will win. As you can see, the advantage to playing a machine like this is that you have more chances at winning, but remember, this is only the case if you play the maximum amount of coins.
Multiplier Slots
This type of slot machine is very common in any casino. On these machines, the payout changes depending on the number of coins you have played. For example, if you manage to get a combination that gives you $20 and you have inserted 1 coin, you will receive $20. If you had inserted 2 coins however, prior to spinning the wheel, you would have gained $40 (2 coins times $20 payout) or $60 if your initial bet was 3 coins.
Bonus Multiplier Slots
This kind of machine works similarly to the multiplier machines, but when the maximum number of coins is inserted and you hit a combination an extra bonus is added. For example, by inserting one coin you win $100, 2 coins you win $200, but if you’ve inserted 3 coins (the max) you win $500.