A code change refers to any alteration, update, or modification made to the source code of a software application or system. These changes can range from fixing bugs and patching vulnerabilities to introducing new features or improving existing functionalities. In cybersecurity, code changes are significant because they can inadvertently introduce new security flaws or vulnerabilities if not properly reviewed and tested. Secure development practices, such as code reviews and automated testing, help ensure that code changes do not compromise the security or stability of the software. Monitoring and managing code changes is a critical aspect of maintaining robust cybersecurity defenses.