Slots are like women: unpredictable. Jokes apart, winning to online slots is not a science. You need perseverance and focus on your goals. Don’t bet too much for each spin and try to keep your bet between 0.20 and 0.40 max.
Try to find a game with a generous RTP to maximize your return. It would help if you also opted for some free slots to play with before starting the game. Try to read online slots review to understand the mechanics behind a game and which one could be the right choice.
Remember also to play with reputable slots, made by a well-known operator, such as Netent or Microgaming. There are also Playtech and Novomatic between these, with an average RTP over 96%, which is always a good choice.