The document discusses different types of organizational structures used by companies: functional, divisional, matrix, and hierarchical. The functional structure divides a company into departments based on roles like finance, marketing, etc. Divisional structures separate a company into divisions based on products, customers, or regions. Matrix structures combine functional and divisional reporting with cross-functional teams. Hierarchical structures rely on a vertical chain of command with multiple levels of authority and specialization. Each structure has benefits like focus and flexibility, but can also have drawbacks such as silos and communication issues if not implemented properly.