A joker can be used to represent any card in a meld, which makes it a very useful tool for finishing challenging combinations. To complete that meld without requiring the actual card, for instance, online slots sitesif you have two 8s of different suits but no third 8 to form a set, you can use a joker as a substitute. Jokers can help players win quickly, but if they are used excessively, they can cause missed opportunities to form more conventional melds. It's usually advantageous to save jokers for crucial situations where they could significantly impact your hand or when you're about to declare Rummy.