The purpose of summarizing is to check for one's own understanding of the speaker's meaning, especially after a lengthy dialogue. Summarizing can also be used to focus discussion. It is impossible to stop communicating. Be aware of your posture, body language and eye contact. It should be kept in mind however, that a cluster of body movements or expressions are needed to indicate a person's attitude, interest level, or feeling when communicating.
Useful feedback is descriptive rather than evaluative or interpretive.
It describes one's own reaction or the other's observable behavior, so the need for a defensive reaction is minimized. Giving useful feedback is an art. Give it out of concern for the receiver, not merely to vent your feelings, but to describe your feelings as crucial information to the receiver on the person's impact on you. Use it to seek alternatives, explore options, rather than giving answers and solutions. Give it as soon as the receiver seems ready to listen.