"Mouse Up" refers to the action of releasing a mouse button after it has been pressed. This action is commonly used in computer interfaces to indicate the completion of a command, such as selecting an item or dragging an object. It is an essential part of user interactions with graphical user interfaces (GUIs), where users manipulate elements on the screen. In programming, "Mouse Up" events can trigger specific functions or actions within software applications. For example, in web development, a JavaScript function may be executed when a user releases the mouse button over a clickable element, such as a button or link. This allows developers to create interactive and responsive user experiences.