In today’s increasingly security-conscious world, Closed-Circuit Television (CCTV) cameras have become a critical tool in both public and private security infrastructures. From deterring criminal activity to aiding law enforcement and enhancing workplace productivity, CCTV systems offer a wide range of applications and benefits. This article provides an in-depth look at CCTV cameras—what they are, how they work, their various types, advantages and disadvantages, modern innovations, legal considerations, and what the future holds for surveillance technology.