Organizational structures define how tasks are divided, coordinated, and supervised within a company. The most common types include functional structure, where employees are grouped by their roles, such as marketing or finance, and divisional structure, which organizes teams based on products, services, or geographical locations. Each type has its advantages, depending on the company's size and goals. Another popular structure is the matrix structure, which combines functional and divisional approaches, allowing for more flexibility and collaboration across departments. Additionally, flat structures reduce layers of management, promoting faster decision-making and communication. Choosing the right structure is crucial for a company's efficiency and success.