Coins can be displayed in a slot by showing how many coins you have altogether. This is generally displayed in the corner of the game window. Once you win money this coin value will increase and when you lose money the coin value will decrease. This coin value is transformed to cash on your casino account.
You can also win a specific amount of coins in slot games. The amount of coins you can win is usually highlighted as soon as you open the game and can sometimes be a very big amount. You can win this coin amount by getting winning symbol combinations.
In a slot game, you can set the coin value by clicking on the arrows next to the coin value display. The amount can be different but usually you find values between €0.01-0.20, and this could even reach up to €2 in some games.
The coin value is the money you want to bet on each payline in the game. For example, if you have 25 paylines activated and the coin value is set to €0.10, then you will make a total bet of €2.5 since 0.10 x 25 = 2.5. If you have 25 paylines activated and you increase your coin value to €0.50, then your total bet for that spin will be 25 x €0.50 = €12.5.