A hitbox is an invisible shape used in video games to detect collisions between characters, objects, or projectiles. It defines the area where interactions occur, such as when a player character is hit by an enemy attack or when a projectile strikes a target. Hitboxes can vary in size and shape, depending on the design of the game and the specific actions involved. In fighting games, hitboxes are crucial for determining whether an attack connects with an opponent. Developers use hitboxes to create fair gameplay mechanics, ensuring that players can accurately gauge their actions. Understanding hitboxes helps players improve their skills and strategies in games like Street Fighter or Super Smash Bros..