Slots at online casinos come in many shapes and sizes and are probably the most popular form of entertainment at the online casino with people playing for cents as well as several Euro per spin. Online casino slots have come on leaps and bounds in recent times and as the casino software improves so do the casino slots and they also become more and more complicated making it a very long winded affair if you need to check every line for a winner. Fortunately that is not necessary as the casino software does it in an instant. There are still the simple three reel slots available at most online casinos where winning lines are obvious but the most played are the 5 reel slots where there can be 20 or 50 or even more winning lines. Choosing an online slot at which to play depends a lot on what the objective of playing is; for example if you just want to spend a few Euro but make it last a while then you need to find a casino slot with fewer winning lines and a low stake per line. Casinos.ie considers that Irish casino players should always play the maximum number of lines per spin that is available and adjust the total cost per spin by lowering the stake per line but if on the other hand your objective of playing casino slots is to win the huge jackpots which often run into the millions of Euro then you will probably need to be playing the maximum stake per line as the large jackpots are often only paid when that is the case. Check your jackpot slot rules for that information. Every online casino offers a complete range of casino slots so picking one that suits you should not be difficult and remember that at a good online casino you will be able to try the slots for free before switching to real money play.