A bit flip is a change in a single binary digit (bit) within computer memory or data storage, where a 0 becomes a 1 or vice versa. This seemingly minor alteration can occur due to hardware faults, cosmic rays, or intentional cyberattacks. Bit flips may corrupt data, cause software errors, or create security vulnerabilities if exploited by attackers to bypass protections or alter program behavior. Understanding bit flips is important for maintaining data integrity and system security.