Online slots differ from physical ones in many ways, including how they look, how they play and how they pay out. The latter use random number generators (RNG) to generate thousands of numbers per second, which are then associated with symbols. When a combination of matching symbols lands on a payline, it triggers a payout.

The graphics and sound effects of an online slot can make or break the experience for players. They must be high-quality to create a realistic and engaging experience, and they can also help boost player engagement and retention. This is why it’s important to choose an online casino that offers games developed by reputable providers.

There are a variety of different themes for slots, including animals, dragons, mythology, sports, movies, superheroes and countries. Some of them even have a progressive jackpot feature, where a percentage of every spin on the game goes into a pot that can be won by anyone who plays it.

It’s important to set a budget for your slot playing, and to stick to it – regardless of whether you win or lose. This can help to prevent financial stress and keep gaming fun for as long as possible. Responsible gambling tools such as deposit limits, loss limits, self-exclusion and time outs can help you control your spending. It’s also important to plan for what you’re going to do after a session, as this can help you avoid that urge to ‘just one more spin’.