If you’re in the audience, the angle of your body and the amount of eye contact you make with the speaker might not seem to affect your quality of experience, but for the speaker, it does. When 50, 100, or 5,000 people can give 10% more of their attention and energy to you — whether through their eye contact, posture, or laughter — it makes the difference between feeling confident and feeling lost. One extra pair of friendly eyes, or the visibility of an affirmative nod now and then, changes how any speaker feels.
