In rummy, players should be mindful of both the cards being discarded and those being picked up. This can show what sets or melds opponents are attempting to create. An opponent's stratfruit shop slotsegy may be revealed and you may be able to modify your own play if, for instance, they routinely select cards from the discard pile that are not immediately helpful to you. Also, observing the frequency and timing of opponents' discards can reveal how confident they are; a player who discards frequently might not be as sure of their hand as one who takes their time.