When a speaker asks the audience to understand new information or learn a new process or skill, the speaker can reduce any uncertainty by moving from unfamiliarity to familiarity of the topic.
While talking to a group of people, a speaker has to substantiate his statements with proper facts and evidence so that the audience trusts him with what he says.
The speaker can easily help to reduce uncertainty of audience by:
Therefore, public speaking requires the speaker to have a detailed knowledge of his/her topic.
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