Forming sets and runs is crucial to winning at rummy. Three or four cards of the same rank but different suits make up a set; for example, three Kings or four 7s. The 4, 5, and 6 of hearts, for exaonline rummy app listmple, are three or more consecutive cards of the same suit that make up a run. Any player who wants to succeed at rummy must learn how to form these combinations. In addition to improving your own hand, being able to identify possible sets and runs enables you to predict your opponents' next moves. Players must choose their cards strategically and with awareness in order to form sets & runs.