A computer mouse is a fundamental input device used with personal computers and other digital devices to control the on-screen cursor’s movement and perform various functions. It is an integral part of the user interface, allowing users to interact with their computers efficiently.The primary purpose of a computer mouse is to provide a precise and intuitive way for users to control the cursor on a computer screen. By moving the mouse on a flat surface and clicking its buttons, users can select, open, and manipulate files, folders, applications, and objects on the screen.