In the context of casino cheating, shuffle tracking is an illegal technique used by players to predict the next card. It involves a cheater trying to watch how cards are placed into the discard tray and how they are shuffled in order to determine which card the dealer will deal next.
Modern casino surveillance technology makes it easy for casinos to catch cheaters who are shuffle tracking. A player who is caught shuffle tracking will usually get banned and added to the black book. Shuffle tracking is a non-issue for online gambling because the cards are shuffled using a computer algorithm.
A method of cheating used by players to predict the next card.