Online slot games are played on computers, tablets and mobile devices. They have several features, including Auto Play and Fast Play options that speed up the game. They also offer free spins and tournament play. Some even have a VIP program. Players can fund their accounts using Visa, MasterCard, Discover or DraftKings gift cards or Play+ cards, a wire transfer via MVB Bank, an online bank account, PayPal or cash by barcode at participating venues. Many slots also have a bonus feature that awards additional spins when you hit certain combinations.

In online slot games, the symbols must appear in a specific pattern to win. Depending on the game, you may need to match them left to right across the reels, diagonally, or in any other position specified by the developer. The winnings are then based on the value of the matching symbols. In addition, some games have special wild symbols that can substitute for other symbols to form a winning combination.

There are hundreds of developers that create slot machines. Some are large international companies with hundreds of employees, while others are small independent studios with only a few staff members. They can have wildly different portfolios, with some developing more popular games than others. Some developers’ slots have particular traits or features that mark them as theirs, and players often look for games by their favorite developers when choosing a casino.

Many online casinos offer a selection of slots by multiple developers. These include big-name developers like Microgaming, NetEnt and Yggdrasil. These developers are known for creating innovative games that work on desktop and mobile platforms. They also tend to have high payout ratios. Some of these games have become so popular that they’ve been licensed for use in land-based casinos.

The earliest slot games were electromechanical electro-mechanical machines with three spinning reels. Modern slot machines are computerized and have five or more spinning reels with vibrant graphics, audio visual side effects and a variety of bonus features. They can also have multiple paylines, a variety of coin denominations, and multiple jackpots. They can be themed from sports, fantasy, food and pirates to magic, history and entertainment.

Some online slots have progressive jackpots, which increase with every bet made on them. This can result in a huge payout when the jackpot is won. Progressive jackpots are not available on all online slots, but they can be found at many of the most reputable sites.

The biggest developers in the industry produce slots with a wide range of themes and features. These games are typically based on popular movies, television shows, famous athletes, rock bands, and other real-world entities. They can be developed through licensing agreements with the originals and feature authentic images and music from them. These types of slots are called branded slot machines. They are usually easier to find at online casinos than their non-branded counterparts.