The best public speakers are authentic. People can spot a faker a mile away.
People pan Elon Musk for being a poor public speaker, but he has the audience eating out of the palm of his hand because he’s candid and authentic. He’s the antithesis of the media trained CEOs and politicians who use prepackaged phrases and say a lot without saying anything.
Speak slowly, pause, and keep it real. That’s the way to connect.

Good advice.
People listen when:
You address their needs
You acknowledge their feelings
You show them how their needs can be met
All done the very wise KISS way
(Keep it simple stupid)