Power-saving modes are features found in many electronic devices, such as smartphones, laptops, and televisions, designed to reduce energy consumption. When activated, these modes lower the device's performance, dim the screen brightness, and limit background activities, helping to extend battery life or reduce electricity usage. These modes are particularly useful when devices are not in active use, allowing users to conserve energy without completely shutting down. By utilizing power-saving modes, individuals can contribute to environmental sustainability and potentially save on energy costs over time.