This document discusses key concepts in business communication and communication skills. It defines business, communication, and communication skills. It then explains the communication process which involves encoding and decoding messages between a sender and receiver through various channels. Effective communication is communication that fulfills its intended purpose by using concrete language, providing practical information, combining verbal and non-verbal elements, and being a two-way process. Principles of good communication include knowing your audience and purpose, presenting information clearly and getting feedback.