Bankroll is the amount of money the gambler is going to spend on gambling. It is wise to keep the bankroll separate from the personal finances. It will help you to avoid many financial problems. There is a bet max button on every slot machine. Bet Max button allows you to play with the maximum bet on this very slot machine. Comp is so called additional bonus, which is given to the player who has been playing one and the same slot machine for quite a long period of time. Comp can be represented by free meals and in come casinos by money rewards. The percentage amount of the house edge indicates how much the casino wins from every bet over a long period of time. Payback is percentage amount of each bet dollar, that is paid back. If you play the slot machine with 86% payback it means that it pays back 86% and 14% is the house edge. Remember that these amounts are taken over a long period of time.

I tis important to now what you are playing.
It is important to know the correct amount of coins that should be inserted into a machine. Before leaving a machine cash out your credits.
While playing just have a good time. Be smart and change oyur bets according to your luck.