Energy-efficient ethernet is a way of using electricity to make your computer connection faster and more efficient. When your computer is connected to the internet, it uses electricity to send information back and forth. Energy-efficient ethernet helps your computer use electricity more efficiently so it can save energy, reducing your electricity bill. For example, when a computer is not sending or receiving data, it can go into a sleep mode and use less electricity. Energy-efficient ethernet also reduces the amount of time it takes for your computer to send and receive data, making your internet connection faster.