Knowing which cards have been played can give you important information about what's left in the deck, even though it might not be as simple as in some other card games lisattaking-upke Blackjack. Using tracking cards to make well-informed decisions. Players can make better decisions about which cards to keep or discard by keeping track of which cards have been drawn and which have been discarded. Players can anticipate possible moves from their opponents and modify their strategies accordingly thanks to this awareness.