Complexity: Most non-slot players think of slots with three reels, and you need to hit three '7s' to score a jackpot.

On others, you'll win infrequently but have the upside for big payouts.

Volatility: On some machines, you'll win more often, but have lower upside for big scores.

The higher the RTP, the more users will win over time, though there will be big swings in small samples.

RTP: Short for 'Return to Player' percentage, it's the percent out of 100% that goes back to the player.

But here are some of the factors to look at. Like in sports betting, there isn't necessarily a consensus 'best slot machine' because what makes it the best may differ from person to person. As technology continues to advance and online gambling becomes more mainstream, it is likely that online slots will continue to grow in popularity and become an even more prominent part of the US gambling industry. Overall, the state of online slot machines in the United States is evolving, with more states legalizing and regulating online gambling. There are hundreds of different options, with all kinds of different types of themes and jackpots available to users. Additionally, the graphics, animations, and bonus features of online slots have continued to improve, making them more engaging and entertaining for players. Online slots offer a convenient and accessible way for players to enjoy the excitement of casino gaming from the comfort of their own homes. Online slots in the United States have become increasingly popular in recent years, particularly as more states have legalized online gambling.

Online casinos must be licensed and regulated by state gaming commissions, and the games themselves must be audited and tested by third-party organizations to ensure that they are fair and random. While online slots are legal in some states, they are still subject to strict regulations to ensure the fairness and security of the games.

There's also been a push in other states as sports betting tax revenue disappoints relative to expectations, but there's nothing imminent as of now. Some other states, such as Indiana, have considered legalization in recent years, but nothing has come of it yet. Online casinos are expected to debut in Rhode Island during the first half of 2024.

As of December, 2023, there are currently four states where online casino gambling, including online slots, is legal and regulated: Michigan, New Jersey, Pennsylvania, West Virginia, Connecticut, and Delaware. In the United States, online gambling laws are regulated on a state-by-state basis, with some states allowing online gambling while others do not.

Casino slot games that pay real money