What does it take to persuade people to act? 
I think it comes down to three elements: Logos, Ethos, and Pathos.  

1. Logos – Reason 
People need to understand why they should act, the logic behind it, the benefits. Here’s the key: those benefits must be communicated from their point of view, not yours. This means the speaker must understand the audience’s assumptions, beliefs, and priorities and speak from there, not from their own agenda. 

2. Ethos – Credibility 
Who are you, and why should they listen to you?  Credibility comes from two sources: 
a) Who you are? Your background, authority, or shared values. 
b) How you deliver? The tone, presence, and consistency of your message. 
Even if your reasoning is strong, if you lack credibility, your message won’t land. 

3. Pathos – Emotion 
You can have logic and credibility, but without emotion, people don’t move. Your audience needs to feel something, for example, anger, pride, empathy, hope, even urgency. Emotion creates connection, and connection creates action.

When logos, ethos, and pathos are all present, your message doesn’t just inform it will inspires action.