Espionage is the practice of gathering secret or confidential information, often for political or military purposes. This activity is typically conducted by governments or organizations to gain an advantage over rivals or enemies. Espionage can involve various methods, including surveillance, infiltration, and the use of informants. The individuals who engage in espionage are known as spies. They may work undercover to collect intelligence or steal sensitive documents. Espionage has played a significant role in history, influencing events such as wars and diplomatic negotiations. It raises ethical questions about privacy and the extent to which governments should go to protect national security.