Public speaking is a process of speaking to a group of people to inform, influence, or entertain the listeners. There are five basic elements to public speaking: the speaker, the message, the audience, the medium, and the effects. The purpose can range from transmitting information to motivating people to act or telling a story. Public speaking can change the emotions of listeners and is considered a discourse community. It is often used for purposes such as motivation, influence, persuasion, or informing and is commonly done professionally for business or commercial events.