What Is a Slot?

A narrow opening, as in a machine for receiving coins or a slot in a wall for a window. A slot is also a place in a schedule or program where an activity can take place. For example, you may need to wait for a flight at an airport, or you might book a time slot a week in advance for a doctor’s appointment.

The probability that a particular symbol will be found in a given reel after a spin is described by its slot (or slot number). These probabilities can be combined to produce a probability distribution, called the basic probability, for each slot in a machine, and are used to determine how much a player should pay to play that game.

Slots can be configured with a variety of properties that govern how they are used within the ATG Service Center. A few of these are particularly important for offer management.

Mathematically fair slots reflect how different the payout odds of a prize are from its probability (true odds). This difference, known as the variance, is usually not transparent for customers and can be an important consideration when choosing a game. The variance of a slot can be displayed in the pay table of the machine as odds format, multiplication coefficient, or the payout amount relative to the credit/coin value.