Communication is a two-way process of exchanging information through symbols between individuals. It has several principles: it is a process, a system, dynamic, and can be both interactional and transactional. The main purposes of communication are to discover, relate, and persuade. Its key components are a sender, receiver, message, channel, feedback, setting, and noise. There are different types including intrapersonal, interpersonal, small group, public, and mediated communication.