To win money playing slots online, it is important to choose reputable and licensed online casinos. Make sure to look for slots with high RTP (Return to Player) percentages to increase your chances of winning. Practice good bankroll management by setting limits on your bets and knowing when to walk away. Utilize bonuses and promotions offered by online casinos to maximize your winnings. Remember that winning at slots is based on luck, so play responsibly and enjoy the experience.