This document outlines the principles of effective communication according to the 7 C's model. The 7 C's are clear, concise, concrete, coherent, complete, correct, and courteous communication. Each C is defined and examples are provided. Clear communication means being unambiguous and easy to understand. Concise communication avoids unnecessary words. Concrete communication provides specific details. Coherent communication uses logical organization. Complete communication includes all necessary information. Correct communication is free of errors. Courteous communication is respectful and considerate of the audience. Mastering the 7 C's leads to effective business communication.