It is hard to save energy you cannot see. Home energy monitors, connected to the electricity supply or to smart plugs, show how much power the home and individual devices use in real time and over the day, revealing where electricity actually goes.
Seeing consumption makes waste obvious, from forgotten devices to inefficient appliances, and helps people shift use to cheaper or cleaner times. Some systems pair with solar panels or batteries to manage them smartly. The insight is only as useful as the actions it prompts, but simply making invisible energy use visible often leads households to meaningful savings.