Over half of the population of the United States is more comfortable talking in smaller, more intimate groups than in front of larger crowds. In corporate America, most likely you will be called upon at some point to deliver a speech in front of a group of people. You might have to give a presentation to a group of people whom you do not know. For most of us, even small, familiar audiences can make us nervous. Whether your speech is impromptu or thoroughly planned, make sure you have a main purpose.