A slot (plural slots) is a narrow opening, especially one for receiving something, such as a coin or a letter. It is also a term used in the computer industry to describe an expansion slot (often abbreviated as e-slot) on a motherboard, through which additional circuitry can be fitted to add functionality to a machine. In the past, slots were often used to add sound cards or video acceleration capability to computers.

The basic concept of a slot is that it allows for random combinations to line up on the reels, which then earn players prizes depending on the specific game. Slots can be played with coins, paper tickets or a combination of both. Until recently — and even today in some locations — players dropped coins into slot machines to activate them for each spin. This changed when bill validators and credit meters were introduced, and it became more convenient to think of wagers as credits rather than coins.

To decide whether or not to play a particular slot machine, look at the pay table. It lists the odds of winning, how much you can win and what symbols are required to trigger the jackpot. Pay tables can be found on the face of a machine or in a help menu on a video screen. The type of slot you choose should match your budget and preferences. If you want to play big, go for a high-variance slot. This means you will have a smaller chance of hitting the jackpot, but you’ll win larger amounts when you do.