Jokers are valuable in Rummy as they can substitute for any missing card in a sequence or set only when you are making a set that is considered pure. You can use jokers and complete your combinations and sets in the rummy to win the game. Jokers work great and can help you in increasing your chances of beating other players. Another thing that you should know is there are two types of jokers you can use in rummy one is printed jokers and other is wild jokers.