Smart appliances improve energy efficiency in homes by utilizing smart technologies and internet connectivity. Devices such as thermostats, lights, and refrigerators can be programmed to operate optimally, adjusting their functions based on user habits and real-time energy data. For example, smart thermostats can learn preferred temperatures and adjust accordingly, reducing energy consumption. Integration with home automation systems allows for seamless control and monitoring, contributing to a reduction in energy costs while promoting sustainable living practices.