feedback
/ˈfiːdˌbæk/
noun
Britannica Dictionary definition of FEEDBACK
[noncount]
1
:
helpful information or criticism that is given to someone to say what can be done to improve a performance, product, etc.
2
technical
a
:
something (such as information or electricity) that is returned to a machine, system, or process
b
:
an annoying and unwanted sound caused by signals being returned to an electronic sound system