This document provides an overview of key concepts in oral communication, including definitions of communication, the elements and nature of communication, different types of speech delivery, and reasons for speaking. It defines communication as a two-way process of sharing meaning between participants using various channels and contexts. The elements of communication are identified as the speaker, message, encoding, channel, decoding, receiver, and feedback. The nature of communication is described as being both process and interactive and involving the symbolic and dynamic exchange of verbal and nonverbal messages over time. Different types of speech delivery are explained as extemporaneous, impromptu, manuscript, and memorized. The three main reasons for speaking are to inform, persuade, or entertain an audience. Examples