Definition
Feedback is information about the output or performance of a system or process that is returned to the input or source. It functions by providing data that allows for adjustments or corrections to be made, thereby influencing future behavior. This is crucial for optimizing system performance, ensuring accuracy, and achieving desired outcomes in real world applications. For instance, a thermostat providing temperature readings back to the heating system is a form of feedback that allows for climate control. Unlike simple observation, feedback actively modifies the system based on its own results. This concept is fundamental in domains like ITIL, cybersecurity, and project management, appearing in certifications such as Security+ and CompTIA Network+.