Online slots are games in which you wager on the outcome of a spin. They use electromechanical reels, but unlike their land-based counterparts, they are controlled by software. The software creates a series of random numbers that correspond to symbols on the reels. The result of a spin is determined by combining these random numbers with your bet.

Slots are a game of chance, but that doesn’t mean they don’t require some level of skill. Experienced players follow a distinct strategy. They play only the games with high payout percentages and know their paylines inside out. They also avoid slots that have a reputation for not paying out. These slots are listed on blacklists by players.

In addition to a solid payout percentage, online slots offer a wide variety of features. Some have progressive jackpots that increase with every bet, while others have different mechanics such as tumbling reels or Megaways. Some feature a storyline and can be played on mobile devices. Others are based on popular movies, TV serials, rock bands or sports celebrities and are developed through licensing agreements with the original providers.

Some online casinos specialize in slots and have thousands of games from many different providers. They may have separate categories for each developer or a specialized menu for their top titles. The quality of these games depends on many factors, including their graphics and audio. They should be compatible with a variety of devices and be easy to navigate. They should also have excellent responsiveness and the ability to adjust the button sizes for touch screens.