A card shuffle is a technique used to randomize the order of a deck of playing cards. This process ensures that no player has an advantage based on the arrangement of the cards. Common methods of shuffling include the riffle shuffle, where the deck is split into two halves and interleaved, and the overhand shuffle, where cards are taken from the top and re-stacked. Shuffling is an essential part of many card games, including poker and bridge, as it helps maintain fairness and unpredictability. Proper shuffling can also enhance the enjoyment of the game by creating suspense and excitement with each deal.