Leadership involves guiding people to work willingly at their full capacity through qualities like influencing behavior, facilitating goal achievement, and managing interpersonal relations. Leadership impacts employee performance, with studies finding leadership accounts for 40-60% of work capacity utilization. The importance of leadership includes influencing behavior, helping followers and introducing changes, while leadership styles can be power-based like autocratic or democratic, and result-based like employee-oriented or production-oriented. Determining the most suitable leadership style depends on factors like the organization and employee skills.