This report delves into the theories, barriers, and strategies of business communication. It explores various theories such as Actor-Network Theory, Adaptive Structuration Theory, and Communication Accommodation Theory. The report also discusses common barriers to communication, including semantic, psychological, organizational, and personal barriers. Strategies to overcome these barriers, such as follow-up communication, active listening, simple organizational structure, and eliminating noise, are also presented. The report highlights the relevance of these concepts to Business United, an international institute of business management.