i am confused about the underlined sentence.

Broadcast a true version of yourself. Be genuine when you speak. While you’re learning a lot from different people, don’t compromise your style if you feel uncomfortable doing it. Smile if you usually do, or be funny or active if you naturally are. Bertie was loved by his people because his stammer humanized him. He was a hero in spite of his imperfections. Be genuine and don’t be afraid of your flaws; they are what make you human.

what does it mean?
thanks in advance