As a part of your Toastmasters journey, you often evaluate others. The best thing that you learn is to give negative feedback in a constructive and helpful way. Instead of saying “your gestures were one-sided” you go with “expanding your gestures to both hands will make you more expressive”.
Suddenly, your feedback is no longer negative, but gives the person a way to improve.
To someone both versions may sound the same. But when you are on a receiving end of such feedback, it makes a difference.