Building performance optimization is the process of improving the energy efficiency, comfort, and overall performance of a building through a combination of design, technology, and maintenance strategies. These strategies can include implementing energy-efficient lighting and HVAC systems, utilizing renewable energy sources, optimizing building thermal insulation, and monitoring and analyzing building performance data to identify areas for improvement. By optimizing building performance, owners and operators can reduce energy costs, improve occupant comfort, and contribute to a more sustainable future.