Double click is a computer action that involves quickly pressing a mouse button twice in succession. This action is commonly used to open or activate an item on a computer screen, such as a file, folder, or program. The first click selects the item, while the second click executes the selected action. Double clicking is a convenient and efficient way to interact with a computer, allowing users to access and manipulate various elements on their screen with ease. It is a fundamental skill for navigating and using computers, making it an essential tool for both beginners and experienced users alike.