The Basics of Online Slots

Online slots are based on randomness. Unlike physical older slot machines, they cannot be tampered with to alter the outcome of a spin. This is thanks to RNG technology and regulations in place for gambling operators.

Many people believe that online slots can take advantage of players. This is simply untrue, and casinos have regulators who regularly test these games to make sure they are fair.


There are a variety of different symbols in online slot games, each with their own distinct purpose. These symbols can either be regular or special, and they can have different payouts depending on the game’s paytable. In order to win, these symbols must appear on adjacent reels and on active paylines. Some symbols also have a multiplier, which increases the size of the winning payout.

The majority of slot games use card values as their standard symbols. These are usually the low-paying symbols and often depict things like diamonds, bells and bars or the number 7. However, video slots tend to be more inventive with their higher-paying symbols. These might depict main characters, animals or objects that are related to the game’s theme or storyline.

Some special symbols are called “Scatter” and can trigger different bonus features, such as free spins, Bonus game or Multiplier. These are the highest paying symbols in an online slot game and can offer players bigger payouts than standard symbols.


In a slot game, paylines determine how often you win based on the number of matching symbols that appear. Most slot games feature fixed paylines. However, some slots have unique paylines that reward you in different ways. These include All Ways, Either Ways and Cluster Pays. You should always check the pay table of a slot to understand its payout patterns.

Most online slot games feature paylines that award a payout when winning combinations of symbols pop up on the reels. These lines typically run from left to right, but some software developers have introduced slot titles that offer payouts in both directions. These are known as 243-win slots and can be found in popular titles such as Microgaming’s vampire-themed Immortal Romance and Norse mythology heavyweight Thunderstruck II. There are also slots that do away with paylines altogether. These are known as cluster pays slots and can be played for free on a demo basis at Unibet.

Bonus rounds

Online slot games offer players a number of special features that can flesh out wins. These features are known as bonus rounds. However, gambling aficionados should understand how these rounds work before betting on them.

Bonus rounds in online slots can come in a variety of formats and styles. Some feature no player interaction at all while others involve a degree of skill, similar to arcade games. Nevertheless, they are all fast-paced and designed to get gamblers back into the base game so that they can continue to bet money.

To trigger a bonus round, you must land dedicated symbols on specific reels or positions. There are also machines that have a collecting mechanism where players can collect certain items to trigger a bonus or minor feature (such as expanding wilds). A growing number of real money slots now allow you to “buy” the bonus round for a fixed price. This is an effective way to speed up the feature and ensure you don’t miss out on a big win.


RTP in online slot games is a mathematical statistic that represents the average payout over millions of spins. It doesn’t reflect the odds of winning a game in a single session, but it can help you find games with the highest potential for consistent profits.

The RTP of an online slot is set by the random number generator (RNG). This software generates a random series of numbers within a fraction of a second, and these determine the outcome of a spin. The higher the RTP, the greater your chances of winning.

The volatility of an online slot is also important to consider. High-volatility games tend to pay out less frequently, but offer better chances for big wins and jackpots. Some casinos show the volatility of each game under their information or rules tabs, but you can also search for this information on your own.