What is an Online Slot?

Online slot is a game of chance that uses a random number generator (RNG) to determine the outcome of each spin. This is what makes online slots different from traditional casino games.

Players can choose to wager on three, five, or even dozens of paylines. They can also adjust the amount of coins that they wish to bet per spin.


A slot machine’s symbols are a key component of the game. The winning combination of symbols can trigger bonus rounds or award high payouts. They can range from traditional fruit symbols to modern video poker symbols. In addition, most online slot games feature scatters, which can either offer free spins or high payouts. Scatters pay anywhere on the reels, and do not need to be landed on an active payline.

Other symbols in online slots are standard reel symbols that fit the game’s theme. These can be low-paying or high-paying and include bar symbols, which consist of elongated rectangles. Other types of standard symbols are stacked symbols, which take up more space on the reels and have a higher chance of becoming part of a winning payline. Another type of symbol is a wild, which can substitute for other symbols on the reels to create a winning combination. A new subset of wild symbols is called expanding wilds, which can change size to fill multiple positions on the reels.


In online slot games, paylines refer to the lines that can generate a winning combination. These lines can be straight or zigzag and run across the reels. They may also have a different orientation than traditional slots, such as upward to downward or vice-versa. The number of paylines can vary between machines, but they are usually listed in the pay table.

It is common to believe that more paylines equal a higher payout, but this is not always true. While more active paylines increase your chances of hitting a winning combination, the actual payout is determined by the amount of money you have wagered. In other words, if you place a ten-dollar bet on ten paylines, you will get a payout of ten dollars. However, if you bet one dollar on fifty paylines, your payout will be fifty dollars. Moreover, some paylines may be adjustable while others are fixed. This difference is important for players who enjoy more flexibility in their betting.

Bonus rounds

Bonus rounds are a fun way to spice up online slots. They can range from simple pick-and-win games to complex multilevel videogame-like experiences. They can increase your chances of winning big and keep you entertained for longer.

Unlike regular spins, bonus rounds don’t take away your real money balance, so they’re ideal for players on a budget. However, you should always weigh up the risk vs reward before participating in these mini-rounds.

To activate a bonus round, you need to land a set of triggering symbols like scatters or special bonus symbols on the reels. The number of scatters required to trigger a bonus round can vary from game to game, and the size of the prize can also vary. The most common bonus rounds are free spins, which you can use to win additional credits. The amount you win during these extra spins will be credited to your account once the feature has been discontinued.


The RTP of an online slot is a key factor that can help players choose the best games for their needs. High RTP slots offer players a better chance of ending a session in profit, and they are ideal for claiming bonuses and promotions that reduce the house edge. However, the RTP of an online slot cannot be 100% or higher, as this would be unprofitable for casino operators and game developers.

Understanding RTP in online slot games can help you plan your gambling budget and make more informed decisions. It is important to remember, though, that RTP only indicates the average payout based on multiple million bets and does not predict individual outcomes. It is also important to understand the concept of volatility, which refers to the frequency and size of payouts. High-volatility slots tend to pay out larger sums less frequently, while low-volatility slots will pay out smaller sums more often. This can lead to long losing streaks or huge wins on a single spin.