Oral presentations are very important to all professionals as they are usually required to make presentations on more than one occasion. Oral presentations can be divided into three categories depending on the time given for preparation. They can be impromptu, extemporaneous, and seminar presentations. Impromptu presentations are the presentations where you are not given any time for preparation, extemporaneous presentations are the presentations where you are given time for preparation but not allowed to read out the material directly from papers, and seminar presentations are the presentations where you are given sufficient time for preparation and you write an essay that you can read out to the audience. ...