Slot machines are pretty much the easiest type of gambling to play there is. Put a token or coin into the machine to begin the game, push a button or pull a handle and watch as the reels spin. One at a time they will stop, and when 3 or more symbols line up on the 'payline', you win the posted amount.

Slot machines will sometimes pay out even if you don't get three of a kind. Payout amounts should be listed somewhere on the machine, different machines and symbols will vary greatly in what pays what.

Some machines have multiple paylines and/or more than three reels. These are typically referred to as "video slots" - because in a brick and mortar casino they would in fact have video terminals rather than physical reels. When playing online all "slot machines" are really video slots, though they are still often referred to as both "reel slots" and "video slots" nonetheless.

Progessive jackpots are also available on some machines - these slot machines have a jackpot that constantly grows until a player hits the right combination and wins it, making for some truly large potential wins when they've had the chance to build up for a while.