Cooper's Law is a theory that says that the amount of data that can be transmitted over a network will double every 18 months. Think of a toy train track - if you add more train cars to the track, the train will be able to carry more things. In the same way, as technology improves and we invent better ways to send information through wires and signals, we can send more and more data at faster speeds. This means that our computers, phones, and other devices will be able to do more things with information because they can process it faster.