A spy is a person who secretly gathers information about a government, organization, or individual. They often work for intelligence agencies, such as the CIA or MI6, and use various methods to collect data, including surveillance, infiltration, and communication interception. Spies play a crucial role in national security by providing insights that can prevent threats or inform strategic decisions. The work of a spy can involve adopting false identities, using disguises, and building networks of contacts. Famous spies, like James Bond in fiction or Mata Hari in history, highlight the intrigue and danger associated with espionage. Their activities can significantly impact political and military outcomes.