The term 'mouse actions' refers to the various ways in which a computer mouse can be used to interact with a computer. The most common mouse action is clicking, which is the act of pressing and releasing the left mouse button. This action is usually used to select an item or open a file. Other mouse actions include double-clicking, which is used to open a file or folder, and right-clicking, which is used to access a menu of options related to the item that was clicked on.