A trackpad, also known as a touchpad, is a flat, touch-sensitive surface used to control the cursor on a computer screen. It allows users to navigate and interact with their devices by moving their fingers across the surface. Trackpads are commonly found on laptops and can also be used as external devices for desktop computers. Trackpads often support multi-touch gestures, enabling users to perform various actions like scrolling, zooming, and switching between applications with simple finger movements. They are designed to provide a convenient alternative to a mouse, making it easier to use a computer in limited space or while on the go.