CCTV, or closed-circuit television, is a system where video cameras are used to capture footage and transmit it to a limited set of monitors for viewing. CCTV is used for security and surveillance purposes in a variety of settings, including homes, businesses, and public spaces. It can also be used to monitor traffic, oversee critical infrastructure, and improve public safety. However, concerns have been raised about privacy and the potential misuse of CCTV footage, leading to increased regulation and oversight of its use.