You can learn about your opponents' possible melds or strategies, for example, by closely observing the cards they are discarding or picking up. An oppohow to open yono sbi appnent may be concentrating on creating particular sets or runs if you observe that they routinely pick up some cards while discarding others. By using this information, you can decide which cards to keep and which to throw away. Also, observing how your opponents play can improve your gaming experience.