Root access is the highest level of control on a computer system, granting users unrestricted access to all files, commands, and settings. In Unix-based systems like Linux and macOS, it allows users to perform administrative tasks and modify system configurations without limitations. On Windows, this is equivalent to Administrator privileges. Root access is essential for system management and customization but carries significant risks. Improper use can lead to system instability or security vulnerabilities. Similarly, on mobile devices, rooting (Android) or jailbreaking (iOS) provides enhanced permissions but can expose the device to security threats and void warranties.