I'll start.
Leadership is being the person that everyone looks up to; the person that sets high level visions for a group of individuals; and the person serving as the main decision maker for the group.
Effective leadership is:
- The ability to persuade others;
- The ability to provide guidance;
- The ability to help others gain skills and knowledge; and
- The ability to inspire and encourage others to learn, to becoming better versions of themselves so that they grow as people and become productive at whatever they do.