If you are trying to persuade an audience on a question of fact, you are dealing with

Persuasive Speech

Explanation:

In order to hold the audience's attention until the very end and to achieve the desired effect, the message you are transmitting must be clear, communicated in simple language, and understandable to everyone. Try to avoid too many professional terms, except in parts of speech, where necessary.

A good speaker is one who understands the masses, the average citizen who speaks the ordinary language. Be convincing. Argued. The message should instill confidence in the listeners and let them know that you are confident and professional.

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