This habit is a powerful tool to effective communication skills which is vital to every leader. Listening to other promote them to be more open to you and yield you with very important information for management and leadership decisions. It also strengthen relationships and reduces unnecessary barriers of communication. It also enable you to understand the things behind the curtain and so will make you an effective leader.
Trait will not only end up listening but learn to understand others. Some people are very difficult to express or deliver the message in a straight forward and right way. As a leader you have to know them and understand from their styles.