A leader is an important part of management who inspires subordinates to achieve organizational goals through their influence and actions, even if they are not a manager. Leadership involves shaping the attitudes and behaviors of others through either formal or informal relationships. Theories of leadership include the trait theory which suggests that successful leaders have inherent traits like intelligence and courage. Situation theory believes that leadership effectiveness depends on matching the leader's skills to the specific demands of the situation. Effective leaders motivate, counsel, and develop team spirit among employees in order to improve performance, productivity, and goal achievement.