PSEG Long Island is a utility company that provides electric service to customers on Long Island and the Rockaways. It operates as a subsidiary of Public Service Enterprise Group, focusing on delivering reliable electricity and maintaining the power grid in the region. The company is responsible for managing the infrastructure, including power lines and substations, and ensuring that customers receive safe and efficient service. PSEG Long Island also engages in various programs to promote energy efficiency and renewable energy initiatives, helping to reduce overall energy consumption and environmental impact.