What Does Feedback Mean?
Feedback is an event that occurs when the output of a system is used as input back into the system as part of a chain of cause and effect. This alters variables in the system, therefore resulting in different output and consequently different feedback as well, which can either be good or bad. In the case of a system which requires knowledge of the output in order to improve or deliver on a specific output, then feedback is essential and good. But for a system that does not require feedback, such as an audio system, then feedback is often bad. Take for example a microphone and speaker system, when the sound from the speakers (output) is picked up by the microphone (input) it creates a negative feedback that produces a very high pitched sound.
Techopedia Explains Feedback
Feedback is basically the concept of taking output and using it as input, either to further drive the system or produce a desired output. A good example is feedback used in an assembly line, when an output does not meet the minimum quality or quantity set by the system, it adjusts itself either to ramp up the production speed or even automatically stop if there are major deviations in the output.
