Energy performance refers to how efficiently a building or system uses energy to provide services such as heating, cooling, lighting, and powering appliances. It is often measured through energy consumption metrics, which help identify areas for improvement and potential energy savings. Improving energy performance can lead to reduced energy costs and lower environmental impact. This can be achieved through various methods, including upgrading insulation, using energy-efficient appliances, and implementing renewable energy sources like solar panels. Monitoring energy performance is essential for achieving sustainability goals and complying with regulations.