Effective Oral Presentation

How to have an effective oral presentation?
As a good and successful oral presenter, one must know a few ways to capture the audiences' heart. So, how to have an effective oral presentation? In my point of view, there are three ways of leading one becomes a good oral presenter. These three ways are determining who are the audience, preparation of speech and the use of audio-visual facilities.
First of all, determining who is the audience. As a good presenter, one must know who is the audience for the presentation.
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