By substituting a joker for a particular card that your opponent is missing but is almost ready to complete a high-value meld, you can both improve your own hand and foil their plans. This two-pronged strategy not only increases your winning chances but also throws ostream india app apkff your opponents' plans, making jokers an effective tool for expert players. When to declare is one of the most important choices in rummy, and it can have a big effect on how the game turns out. When you have made enough melds to reduce the total value of the unmelded cards in your hand, you should declare. This entails evaluating not just your own hand but also any potential opponents' hands. Declaring might be a good idea if you think it will give you the advantage given the current situation & the possible points at risk.