Completeness in communication refers to the degree to which a message includes all the necessary information and details required to convey the intended meaning accurately. It is one of the 7 Cs of effective communication, which are applicable to both written and oral communication. A complete communication should convey all facts required by the audience, and the sender of the message must take into consideration the receivers mindset and convey the message accordingly. A complete communication has several features, including developing and enhancing the reputation of an organization, being cost-saving, giving additional information wherever required, leaving no questions in the mind of the receiver, and helping in better decision-making by the audience. Completeness is vital for effective communication as it ensures that the receiver of the message fully understands the information being conveyed, enhances transparency and trust in communication, and helps in avoiding unnecessary follow-up questions or delays.