Public speaking has a long history dating back to ancient times. It was practiced among Hebrews and Greeks who developed theories and techniques. The Romans adopted these practices and were influenced by orators like Cicero. Modern developments include speeches by historic figures like Martin Luther King Jr. and advances in technology now allow public speaking over the internet or video conferences. Effective public speaking requires clarifying objectives, understanding the audience, organizing information, choosing visual aids, practicing delivery, and can be used to inform, motivate or persuade audiences.