A smart thermostat is a device that allows homeowners to control their heating and cooling systems remotely, often through a smartphone app. These devices learn user preferences over time, optimizing energy usage and enhancing comfort by adjusting temperatures based on occupancy and habits. In addition to remote control, many smart thermostats offer features like energy usage reports and integration with other smart home devices. This technology not only helps in reducing energy bills but also contributes to a more sustainable lifestyle by minimizing unnecessary energy consumption.