Espionage is the practice of secretly gathering information. It has been around for a very long time – it dates back to Ancient Egypt, where the Pharaohs sent spies to report back information about enemy armies. In modern times, spies are sometimes sent to other countries to find out information, but they can also secretly spy on people within the same country. It can be done using hidden cameras, listening devices, or even hacking into people’s computers. Countries and organizations use espionage to gain an advantage over their enemies or competitors. So, basically, it’s about secretly getting information about people or organizations for an advantage.