Organizational communication involves the flow of information within a company. It can occur horizontally between coworkers, vertically between managers and employees, and diagonally between different departments. Effective organizational communication is important for coordinating activities, sharing information, and achieving both individual and company goals. The document discusses different types of internal and external communication, as well as formal and informal communication methods used in companies. It also explains how the communication structure depends on factors like the organization's objectives, leadership style, and whether it is a conservative, multinational company. Designing multiple communication mechanisms is important for large, complex organizations to allow information to flow efficiently to where it is needed.