Leadership is the process of guiding, instructing and motivating others to accomplish important goals and objectives. A leader could be a team lead, a supervisor, a manager, a managing director or a CEO. Although these are formal positions, there are often instances where certain individuals become the informal leader of a group of peers simply because of their attributes.
Showing leadership & initiative can set you apart from other job candidates because to an employer it means you can achieve objectives or targets more effectively.
When you show initiative, you do things without being told; you find out what you need to know; you keep going when things get tough; and you spot and take advantage of opportunities that others pass by.