The word leader has been getting some mixed definitions lately.
A leader is simply a person who has influence over other people. A leader is not necessarily a manager. A manager is a person who is hired to manage employees. Anyone can be a leader, but it is not easy to be a good leader. A good leader will listen to the advice of the other people in the group and act on that advice. Of course, you cannot please everyone all the time, but a good leader will always do what is best for the group in general. And the only way to find out the needs of the group is to listen.
Learn more Introvert Leader skills by reading Leadership for Introverts.