This document provides guidance on how to give good design feedback. It explains that feedback should include establishing common goals up front, asking why certain design choices were made, looking for specific pain points or issues, and considering the bigger picture and overall goals of the project. Bad feedback includes vague comments, dictating specific design changes without input, or taking a vote without discussion. The document encourages feedback that finds opportunities to improve rather than just faults, while being honest and using exercises to facilitate constructive discussions.