Slot games, also known as slot machines or simply slots, are a type of casino game where players bet on the outcome of a spin of reels containing symbols. The reels are typically three or five in number and are set into motion by pulling a lever or pressing a button.

The objective of the game is to match symbols on the reels in a specific pattern, known as a payline, which results in a payout to the player. The payout amount is usually determined by the type and number of symbols matched, as well as the size of the bet made by the player.

Slot games have evolved significantly since their inception in the late 19th century and are now available in a wide variety of themes, with advanced graphics and special features such as bonus rounds and free spins. They are popular in both land-based and online casino and are often one of the most heavily played games in a casino.