Does your appearance reflect modesty and good judgment?
When you are clean and well-groomed, others will likely conclude that you have self-respect, and they will be more inclined to listen to you. Your being appropriately dressed will also reflect well on the organisation that you represent and on your listeners.
What do you need to do?
Be neat, clean, and modest in your clothing.
Posture shall convey an attentive attitude.
Bad smells are prohibited.
Hair shall be neatly combed or set.
Eyes contact ought to say something from your heart or thought.
Smile enough to show your warm welcome and friendly.