When you play a slot machine, the odds of winning are set by its computer program. You cannot increase your chances of winning by changing the settings or doing anything else. However, you can control the amount of money you win or lose by choosing which paylines to bet on.
You can also choose to play high or low volatility slots. High Volatility slots pay out less often but when they do the payout is big. Low Volatility slots are the opposite, they pay out regularly but the amounts won are small.
Whenever you are playing a slot game, always check out the pay table. This will show you how much each symbol in the game pays, and what combinations are needed to trigger a win. In addition, the pay table will explain any bonus features that the slot has and what they entail.