The best online slot sites take a variety of different factors into account when deciding what type of games to offer. These factors include the number of reels, payout options, bonus features and much more. Ultimately, the game you choose should match your playstyle and budget. It should also be easy to use, allowing you to navigate through different sections and games with ease.

The concept of playing Slot online is the same as with traditional physical slot machines – spin the reels to match symbols and win. But online slots have more options than their brick-and-mortar counterparts, offering new mechanics and features that can boost your chances of winning. For instance, a new feature called Megaways has multiple reels and pays out when matching symbols appear anywhere on the screen. Other examples of new mechanics include cascading reels, expanding wilds, and stacked symbols.

Scatter symbols also add a new element to online slots. They can trigger different payouts and bonus features such as free spins, jackpots, and bonus games. They can also increase your chances of hitting a certain payline, which is important for beating the house edge.

Another factor to consider when choosing an online slot is its RTP (Return to Player) value. This figure shows you how much, on average, a slot will pay back over time as a percentage of your total wagers. It is a scientific calculation that takes into account different types of winning and losing streaks.