Fuzzing is a security testing technique that feeds invalid, unforeseen or random data to an application to reveal its latent vulnerabilities. It can be used to identify input verification vulnerabilities, crashes, and security vulnerabilities before attackers can use them. Fuzz testing on a regular basis enhances the resilience of the application and the quality of the code. Adhering to organized security measures recommended by C9Lab provides ongoing testing, evaluation of risk and preventive care on vulnerabilities to maintain web applications safe and trustworthy.