Root access in computing refers to the ability to gain unrestricted control over a computer system or device. It allows users to access all files, run any programs, and make changes to the operating system without limitations. Gaining root access is often essential for advanced tasks, such as installing software or configuring system settings. However, it carries security risks, as root users can inadvertently modify critical files or settings. Therefore, root access is typically restricted to administrators or advanced users who understand the implications of such access.