What You Need to Know About Slot Machines RTP Slot machines are popular casino games that offer players a chance to win cash prizes. These games use a random number generator to determine the results of each spin. The numbers that form the machine’s theoretical number set vary, from hundreds in a traditional slot to tens of thousands in a multi-line video slot. Payout Percentage A slot’s payout percentage is the average amount that a player will win compared to how much they have wagered. This is a key factor in choosing which slot machines to play at a particular casino. It is important to note, however, that payout percentages are not an exact science. They are calculated based on millions of spins and the average outcomes. This means that you can lose a lot of money before winning something substantial, even when playing with high-payout percentages. Pay Table A pay table is a screen or series of screens that contain all of the instructions for a specific slot game. It explains how much to bet, the rules for special features and paylines, and any jackpots available. It also tells the player how to earn rewards points for playing. The pay table may be permanently displayed on a slot machine or, more often with newer-style slots, can be switched from one image to another using a touchscreen display. The paytable area may list all possible jackpots or just those with the highest values. It can also list all of the multipliers or “wild” symbols used in a certain game theme. Bonus Rounds A bonus round is a feature that can be triggered by matching three or more scatter symbols. It can also be triggered by hitting a special number or combination of symbols on the reels. Usually, bonus rounds require that you make a bet in order to access them. This can be done either through a separate button on the side of the machine or by pressing a bonus button on the slot’s control panel. Depending on the model of slot, it may also have a second display area that displays a different game theme for the bonus round. This can be a secondary display on the front of the slot or, more often with video slots, an additional display that is abruptly shown when the bonus round begins. Service Light A slot machine’s service light is located at the top of the machine for ease of sight by casino employees. It can be activated to alert the attendant to a problem or to give players reassurance that the machine is working properly. Touchscreens and Newer-Style Machines The majority of modern slot machines have a touchscreen display. This replaces the physical keypad that was required in earlier models. The touchscreen can be used to place bets, view basic information and run a running total of reward points earned during the current play session. While this technology is becoming more common in casinos, it has some disadvantages. For example, it can cause delays when a coin hopper is full. It also requires a higher vault space, which can cost a casino more money in terms of coin processing and other expenses. In addition, it can create a lot of noise and disrupt other people in the casino. It can also lead to more customer complaints about the machines.