A "Trap Card" is a type of card used in the trading card game Yu-Gi-Oh!. These cards are typically set face-down on the playing field and can be activated in response to specific actions taken by the opponent. They often provide strategic advantages, such as negating attacks or altering the game state. Trap Cards are categorized into three types: Normal, Continuous, and Counter. Normal Trap Cards are used once and then sent to the graveyard, while Continuous Trap Cards remain on the field until destroyed. Counter Trap Cards can only be activated in response to other card effects, making them powerful defensive tools.