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Mobile Slots FAQs

A beginners guide to slot terms

Updated Nov 15th, 2023

Online slots and mobile slots are so easy to play; even if you don’t understand the slot terms at first, it doesn’t take long until you get to grips with the features.

However, for those of you who like to know the ins and outs before playing, here’s a glossary of the main slot machine terminology you should understand.


Do you want to watch the reels spin and not have to touch a thing? This feature is now common for most online casino slots, where you decide how many spins and the value of each spin. You can’t always be guaranteed to find them on mobile slots however, you’ll have to read our slots by software to see how each of them present their mobile slots.

You can stop the auto spin function at any time you want, and some of the very clever mobile slot games will even give you options to make it stop if you win big, get a special feature or free spins. Beware, on mobile devices, your phone or tablet might decide to go to sleep as it sees no activity, so turn off the sleep function if you’re going to auto-spin.

Bet Max

Bet the maximum amount’ or the maximum amounts you can wager on that spin, considering the maximum amount of reels and coins. It’s the lazy man’s way of setting your betting amount and one we don’t highly favour. Sometimes, you need it to meet the requirements to win a jackpot, but that’s more the exception rather than the rule. We always recommend you set your limit and spin to fit our budget.

Free Spins

What true slot player doesn’t love free spins? A feature or bonus that simply forces the machine to spin the reels, and you don’t have to pay any extra. We love mobile slot machines with free spin rounds, as you can get great wins, making up for all the base game spins it took to trigger them. Plus, the free spins come with a multiplier on many mobile slots, making them even more profitable. Good mobile games with this feature are Thunderstruck II, Gonzo’s Quest and Mega Moolah.

But ultimately, what we love most is that all the winnings go straight into your pocket.


Slang for winning on a slot machine. ‘This machines has some big hits‘ mean it has some big win potential.


It pretty much means what it describes – these are bonus features or symbols which multiply your win by a set amount. 2x multipliers, for example, double any wins. These are usually tied in with free spins, wild symbols or special features within the games.


See those numbers on the left and right of the slot? Those are the paylines. When the symbols align to those numbers, you get a win. The most basic ones have only one (your classic fruit machines say) and some of the more entertaining ones can go up as high as 99 paylines.

When you pick an online slot, you can usually pick how many paylines you want to play (showing you the payline available as you pick), but we’ve yet to ever play anything other than the maximum paylines for any slot. We like to maximise our chances. The only exception we can think of is Marvel’s Fantastic Four mobile slot by Playtech, whose odds are improved by decreasing the number of paylines.

However, as a general rule, if you can’t afford all the paylines, try a different mobile slot with fewer paylines. Most paylines pay from left to right.

Progressive jackpot

Most video slots have their own individual jackpots, which is really just a ‘maximum win’ for that particular online slot. However, progressive jackpots make things interesting, as it’s a growing pot of coins added to by every player who plays that slot game in every casino that features the game. So the very famous Mega Moolah slot, for example, builds and builds to millions of euros/pounds as a small percentage of every player who plays on this slot machine goes towards the winning jackpot prize. These progressive slots can hit anywhere, at any time, at any online or mobile casino. It’s like a glorious ticking time bomb of money, and one most of us are drawn to like flies to honey.

We have a list of the best progressive jackpots on mobile slots here.

Scatter symbol

If the wild symbol is the joker in the deck of cards, the scatter symbol is its meaner, slicker big brother. This unpredictable symbol changes depending on the rules of the mobile slot, usually triggering bonus features and free spins. At its simplest moment, it means that you’ll create a win when you get two or more of the scatter symbols anywhere on the reels. The symbols do not have to be on an active payline; they can be anywhere on the reels.

It is the only symbol that usually cannot be replaced by the wild symbol. It’s the ‘X-factor’ in most online mobile slot games and one we watch avidly.

Wild Symbol

The aforementioned joker in the pack usually replaces any other symbol to create winning combinations. It can also work as a multiplier, giving you bigger wins. We love the wild symbol.

Winning combinations

Winning combinations are all possible layouts of symbols that result in a winning payout. Usually, it is 2, 3, 4, or 5 of a kind on an active payline, but this depends on the reel layout of a slot and its underlying slot mechanics.

Wagering requirements

Wagering requirements are the number of times you have to play an amount of money before you can claim your winning. Usually associated with special offers, bonuses and free money. Read our ‘should I take the welcome bonus’ for more info.

If you want to find out more, take a look at our “Casino Slots Terms and Phrases Explained” where you will find a complete list.

Here are our 3 best slot machines for beginners to play online and on mobile:

  • Starburst: One of the most popular NetEnt slots online, it’s simple fun with an expanding wild that gives you a re-spin for more chances at winning.
  • Mega Moolah jackpot slot: This is an example of an easy to play safari themed jackpot game from Microgaming. Spin to win millions.
  • Enchanted Crystals: A Play’n GO slot machine this game gives you some great examples of expanding wilds, click me bonus games and free spins.

And here’s one of our best slots sites that welcomes you in and continue to reward you no matter how you play:

  • LeoVegas casino: play over 1600 slots and casino games, with a huge exclusive LeoJackpot starting at 5 million to be won playing on top games like Book of Dead and Starburst. LeoVegas provides an all-around online gambling service for beginners and experienced slot players.

Start Playing at LeoVegas Casino »


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