Organizational behavior can be studied at three levels - individual, group, and organizational. It seeks to understand and explain human behavior in organizations. Key aspects of organizational behavior include leadership, motivation, communication, and organizational culture and change. Theories of organizational behavior aim to help managers understand employees' behavior and direct it towards achieving organizational goals. Managers can influence behavior through power, leadership style, effective communication, and creating the right organizational climate and culture. Organizational behavior also helps organizations adapt to environmental changes.