Leadership can be defined in several ways, focusing on influencing others towards goals, persuading others to achieve objectives, and helping others improve. Effective leadership requires a group of followers, is a reciprocal relationship between leader and followers, and depends on the specific situation. Key roles of a leader include paying attention to customer needs, empowering and supporting subordinates, providing inspiration and motivation. Critical qualities of a good leader encompass energy, strong communication and problem-solving skills, integrity, and the ability to adapt. Different leadership styles include charismatic, autocratic, democratic, and bureaucratic approaches.