When you play a Slot, the outcome of each spin is controlled by a random number generator (RNG). The RNG cycles through thousands of numbers every second, and when it matches symbols on a payline as per the game’s rules, you win. This technology allows casinos to replace their army of mechanical slot mechanics with a single computer server and reduce costs.

Despite this, Slots still look and feel like the old mechanical ones, and have a huge range of fun features and variations. The key is to know what to look for and how the different games work.

There are three types of Slots – classic, video and progressive. Classic slots, also known as one-armed bandits, have a very simple interface with three reels and a single pay line. They’re great for beginners or those who prefer a more straightforward gaming experience. Video slots are more complex, with five or more reels and multiple pay lines that increase your chances of winning. These machines also feature advanced graphics and interactive elements like Hold and Spin, exploding wilds and expanding wilds. Some have progressive jackpots that grow over time.

No matter what type of Slots you choose, it’s important to set limits for yourself and stick to them. This will help you have a good time without going over your bankroll. If you’re playing for real money, consider using cash as opposed to a credit card to make it easier to stay in control of your spending habits.