Surveillance refers to the monitoring of behavior, activities, or information for the purpose of gathering data or ensuring security. This can involve various methods and technologies, including cameras, audio recording devices, and tracking systems. Surveillance is commonly used by government agencies, law enforcement, private organizations, and individuals to oversee and observe individuals or groups in public or private settings. The primary goals of surveillance may include crime prevention, threat detection, safety assurance, and research purposes. The practice raises important ethical and legal considerations, particularly regarding privacy rights and consent.