Slot machines are gambling devices where you insert money and then press buttons to bet and spin reels. The goal is to get matching symbols on the payline to win. Modern slot machines use credits instead of coins, and winnings are paid out according to a pay table that shows the value of each symbol combination. Some machines have multiple paylines or special features like bonuses. It's important to check the denomination of the machine to know the value of each credit and to use the 'game rules' or 'help' function if you're unsure about payouts or features.