Distributed energy is an approach to energy generation and distribution characterized by decentralized, smaller-scale sources located near consumption points. As a research concept and academic field, it investigates the technical, economic, social, and regulatory aspects of deploying, integrating, and managing these distributed energy resources (DERs) within or alongside traditional energy systems. Its key characteristics include modularity, proximity to load, and technological diversity, while its significance stems from its potential to enhance grid resilience, facilitate decarbonization, reduce transmission infrastructure needs, and empower local energy systems.