It is the information that flows between people that has to do with their interaction in the here and now. Effective feedback, both positive and negative, is helpful to others. When you give feedback you are offering valuable information that will be useful to another person making decisions about how to behave. Also, feedback allows us to build and maintain closeness with others. Criticism is evaluative and feedback is descriptive.
Evaluation is difficult to work with constructively.
Feedback provides the individual with information that can be used in performing personal evaluation. It is specific rather than general. It is focused on behavior rather than on the person. It takes into account the needs of the receiver of the feedback. Feedback can be destructive when it serves only our own needs and fails to consider the needs of the person on the receiving end.