In blackjack, a "push" occurs when a player's hand and the dealer's hand have the same total value. In this situation, the player neither wins nor loses; they simply retain their original bet. The round effectively ends in a tie, and the player gets their stake back. Pushing typically happens when both hands result in similar outcomes, such as both being 18 or higher without exceeding 21. This rule prevents the player from losing money on that round, but it also means they don't gain any winnings.