ELI5: Explain Like I'm 5

Smart meter

Smart meters are special type of electricity meters that can measure how much electricity your home is using. They send this information to your energy company automatically, so they know when you are using more or less electricity. It means they don't have to send someone to your house to take a manual reading of your electricity meter each time they need to calculate your energy bill. Smart meters also help you to save energy, because you can see how much energy you are using, and when you are using it.