This document discusses communication and feedback. It defines communication as the mutual exchange of understanding between people. Feedback is described as a key part of the communication process, as it allows the sender to understand how the message is being received and make adjustments. There are different types of feedback, including positive and negative feedback on past behavior, and positive and negative guidance for future behavior. Feedback can take both verbal and non-verbal forms. The impact of feedback is that it improves the quality and accuracy of communication by creating a two-way exchange.