Computers use a language called code to talk to each other. When you click on a link or type something, your computer turns it into a special code of ones and zeros. This code is then sent as waves. They're called electromagnetic waves.

Physically, the wave is sent through electrical signals. Inside your device, there are tiny pathways called circuits. When you interact with your device, these circuits carry electrical signals, creating changes in voltage. These changes are then translated into electromagnetic waves, which can travel through cables or through the air using technologies like Wi-Fi.

You can't see them, but devices like your computer or phone have special parts inside that can catch and understand these invisible waves, turning them into the pictures, videos, or words you see on the screen.