The least useful feedback is vague ("make it pop") or purely subjective without reasoning. The most useful explains the underlying concern, which lets the designer or developer address the real issue, often better than your suggested fix would.
Consolidate feedback rather than sending a stream of one-off notes, and separate must-fix issues from preferences. Timely, specific, goal-oriented feedback keeps work moving and produces a better result than either silence or a flood of contradictory comments.
Updated July 2026