Emotional intelligence (EI) involves the ability to understand and manage one's own emotions and recognize emotions in others. It has four components: self-awareness, self-management, social awareness, and relationship management. Developing strong EI skills is important for forming relationships, achieving success at work, and leading a fulfilling life by navigating social and emotional situations effectively. Those with low EI may experience problems like stress, poor health, weak relationships, and feelings of alienation.