The primary focus of a persuasive speech is to persuade, be it a product or an event. Persuasion is necessary to encourage people to be interested in what you are talking about.
An object will remain in motion or at rest unless it is acted on by a force
The reason for a persuasive essay is to convince the audience to your point, so if the audience is not convinced with you point then your persuasive writing is not good, if the audience is convinced, then your writing is good.
This is perhaps in part due to my pedantry, and inpart due to advancing age
Make a place of your own
And then answer all of these questions as you go along