Energy demand refers to the amount of energy required by a system or an individual for performing various activities. It is the quantity of energy that must be supplied to maintain a certain level of performance, comfort and convenience in homes, industries, transportation systems, etc. Energy demand can vary depending on factors such as weather conditions, population density, economic activity levels, technological advancements, and lifestyle changes. Understanding energy demand is crucial for efficient planning and management of energy resources to meet the needs of society while minimizing environmental impacts.