The document discusses the discipline of communication and its key aspects. It focuses on how humans use verbal and non-verbal messages to create meaning in various settings from interpersonal to mass communication. The discipline studies communication in various contexts like interpersonal relationships, administration, cultures, and technology-facilitated communication. It also examines the process of clearly expressing and understanding ideas through written, verbal, nonverbal, and multimodal forms. The document then outlines various means and elements of communication, levels of communication from intrapersonal to mass communication, and professionals in the field like communication specialists and journalists.