An analog stick, also known as a joystick or control stick, is an input device used for computer games and other applications. It consists of a horizontal stick that can be moved in any direction (left/right, up/down, forward/backward) to simulate movement on the screen. The position of the stick determines the direction and speed of the cursor or game character's motion. Analog sticks are often used as an alternative to digital buttons for more precise control and accuracy when playing games or performing other tasks that require fine motor skills.