A "long press" is a touch gesture used on devices like smartphones and tablets. It involves pressing and holding a finger on the screen for a few seconds, which can trigger specific actions or options. This gesture is commonly used to access additional features, such as context menus or to select items. For example, when you long press an app icon on a device's home screen, it may display options like uninstall, share, or app info. This method provides a quick way to interact with apps and settings without navigating through multiple menus.