Mouse activity refers to the physical actions of a computer mouse, such as clicking, double-clicking, dragging, and scrolling. Clicking is the most basic action of a mouse, which involves pressing and releasing the left mouse button to select an object or open a program. Double-clicking is the same action done twice in quick succession, which is often used to open a file or folder. Dragging is the action of holding down the left mouse button while moving the mouse, which is used to move objects or select text. Scrolling is the action of using the scroll wheel on the mouse to move up and down a page.