Social intelligence plays a vital role in shaping effective interpersonal relationships and promoting positive social functioning within educational and broader social contexts. It refers to the ability to understand social situations, interpret the emotions and intentions of others, and respond appropriately to social interactions. In educational and social settings, social intelligence contributes significantly to emotional well-being, social adjustment, academic engagement, and collaborative learning. This paper explores the concept of social intelligence and examines its relevance in educational institutions and everyday social environments. It highlights key components of social intelligence, including empathy, social awareness, communication skills, emotional regulation, and adaptability. These components enable individuals to interact constructively with peers, teachers, family members, and the wider community. The development of social intelligence is especially important in diverse and inclusive settings, where understanding individual differences and cultural sensitivity is essential. In educational settings, social intelligence supports effective classroom management, positive teacher–student relationships, and cooperative learning experiences. Students with higher levels of social intelligence demonstrate better peer relationships, improved problem-solving skills, reduced behavioural difficulties, and greater academic motivation. Teachers who exhibit strong social intelligence are more capable of fostering inclusive learning environments and responding sensitively to students’ social and emotional needs. Beyond education, social intelligence is crucial for maintaining healthy social relationships, resolving conflicts, and promoting social harmony. The paper also emphasizes the role of educational programs, social–emotional learning initiatives, and experiential learning strategies in enhancing social intelligence among learners and educators. By integrating social intelligence development into educational practices and social interactions, institutions can contribute to the holistic development of individuals and the creation of more empathetic, cooperative, and socially responsible communities. The paper also highlights the importance of integrating social intelligence development into educational practices through social–emotional learning programs, collaborative activities, and experiential learning approaches. Strengthening social intelligence in educational and social settings supports holistic development and contributes to the formation of empathetic, socially responsible, and well-adjusted individuals, thereby enhancing social harmony in a diverse society.