Surveillance involves the monitoring of activities, behavior, or other changing information for the purpose of influencing, managing, directing, or protecting people. It can be conducted through various means, including video cameras, drones, GPS tracking, and electronic monitoring. Surveillance is used for a variety of purposes, including law enforcement, national security, retail analytics, and workplace monitoring. However, it raises ethical and privacy concerns regarding the balance between security needs and individual rights to privacy. Proper regulation and oversight are essential to ensure surveillance practices are lawful, ethical, and respectful of civil liberties.