Many people don’t realize the difference and often say bio when they mean introduction. And many non-professional speakers mistakenly supply their bio as an introduction.
There is a big difference between these two documents in their purpose and hence their form. Function always drives form.
The speaker’s bio (biography) is meant to be read silently. It is printed in the program and meant to impress readers with the credentials of the speaker and attract them to attend the presentation. The bio in it’s worst form looks and feels like a resume. The bio could easily be a full page or several hundred words.
Do not read the speaker’s bio to the audience. It will usually be boring. Not the right start to a presentation.
The speaker's introduction is meant to be heard by the audience just before he starts to speak. It is meant to serve as an introduction to the presentation as delivered by this speaker.
The purpose of a good introduction is to get the audience interested in the topic and confirm the speaker as the best choice for this topic. After a good introduction the audience should feel eager to hear the speaker present on this topic. Also the speaker will feel welcomed by the introduction and audience reaction.
The ideal introduction would have 3 short paragraphs. The first one introduces the topic. The second reminds people why the topic is so important. The third one highlights the reason this speaker is qualified to speak on the topic. This third paragraph will be a selection of the most interesting points from the speaker’s bio. Print the introduction in large type double spaced to make it easier for the introducer to read.
It should take between 30 to 60 seconds for the introducer to read. Anything longer is wasting time. Don't put people to sleep before the speaker starts.
The more prominent the speaker, the shorter the introduction can be. For example “Ladies and gentlemen, the President of the United States”. The bio would be quite different from the introduction.
If you are the speaker, be sure to talk with your introducer before the introduction and ensure that she has the correct pronunciation of your name.
A bio is like a history report. An introduction opens new relationships.
Read "How to Introduce Your Guest Speaker"
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