Define surveillance???

Surveillance refers to the monitoring, observation, or supervision of individuals, groups, or activities to gather information, prevent or investigate potential threats, or maintain control. It involves the use of various techniques, technologies, or methods such as video cameras, audio recording devices, tracking systems, or data analysis to collect and analyze data for the purpose of surveillance. Surveillance can be conducted by governments, organizations, or individuals for security, law enforcement, intelligence gathering, or other purposes.