A slot is a narrow opening in a machine or container, for example a hole that you put coins in to make the machine work. A slot can also refer to a position in a group, series, or sequence of events.

A machine with a pay table that lists the number of credits a player will receive if the symbols listed on the pay table line up on the pay line. The pay table is often displayed on the face of the machine, but may also be contained within a help menu on video slot machines.

Symbol Probability

Modern slot machines use microprocessors to program the symbols, which assign a probability to each symbol to ensure that winning combinations occur. This reduces the chance that a losing symbol will appear, but it also creates a greater number of winning combinations than would be possible with a physical reel.

Bonus Rounds

A bonus round is a feature of a slot machine that increases the winnings of eligible players. It is usually triggered by hitting a specific number of symbols on the reels.

Return to Player percentage

A slot’s RTP is a theoretical figure that determines the average amount of money it pays out to players. This number is calculated using a statistical model and does not account for how much a slot machine pays out or whether it has fewer chances to trigger a bonus round than other slots.

The return to player is a good indicator of how profitable a slot is. If it pays out more than other slots, the machine is considered a high-payout slot.