you want to convey. In most cases, the main point of the presentation should be simple 
and clear. The audience should be aware of the key points that you plan to make so that 
the content of the presentation can be understood in the proper context. In most cases, 
it’s helpful to pique the group’s interest (perhaps with a joke, anecdote, or illustration) 
early in the talk. If the purpose of your presentation is to persuade the audience about 
some issue, you should ensure that you have gained their conﬁdence (for example, by 
making the members of the audience aware of your expertise and credentials). Also, 
persuasive presentation should include speciﬁc instructions on how to implement the 
suggestions you provide (for example, where to obtain the product you are selling).