Emotional Intelligence is a different way of being smart. It includes knowing what your feelings are and using your feelings to make good decisions in life.
It's being able to manage distressing moods well and control impulses.
It's being motivated and remaining hopeful and optimistic when you have setbacks in working toward a goal.
It's empathy; knowing what the people around you are feeling.
And it's social skill - getting along well with other people, managing emotions in relationships, being able to persuade or lead others.