Intelligence agencies are government organizations responsible for gathering, analyzing, and acting on information related to national security. They play a crucial role in protecting a country's interests by monitoring threats, conducting surveillance, and providing strategic insights to policymakers. Agencies like the CIA in the United States and MI6 in the United Kingdom are well-known examples. These agencies operate both domestically and internationally, often engaging in covert operations to thwart potential dangers. Their work involves collaboration with other nations and organizations, ensuring that vital information is shared to maintain global security and stability.