Say you see your opponent is about to complete a set or run, you can decide to use a joker or wild card to prevent them from doing so. You can also reduce the number of cards in play by strategicalplayson slotsly using jokers & wild cards to increase your chances of drawing valuable cards from the draw pile. All things considered, jokers & wild cards are effective rummy tools that can both significantly improve your ability to form sets and runs and sabotage your opponents' hand formation. In rummy, knowing when to declare is an essential skill that can significantly affect the result of the game.