The "Pinch Gesture" is a common touch input method used on devices like smartphones and tablets. It involves placing two fingers on the screen and moving them closer together or further apart. This gesture is primarily used for zooming in and out of images, maps, or web pages, allowing users to adjust the view easily. This gesture is part of a broader category of touch gestures that enhance user interaction with devices. Other gestures include swipe, tap, and long press, each serving different functions to improve navigation and usability in applications and operating systems.