Slot machines all basically work the same way: you set the number of paylines and the bet per line. With each additional line, your chances of winning and your stake per round increase. With the autoplay function, you can set a certain number of rounds, which the game then plays for you automatically.
Many slots offer additional chances of winning via special symbols such as multipliers, jokers, wilds and scatters or have integrated additional rounds/mini-games. Likewise, many games are available in a Deluxe or Megaways version.
We recommend that you read the game instructions first (click on Help/i/? in the game) or play a few rounds in demo mode before wagering your money.