Camera zoom refers to the ability of a camera lens to change its focal length, allowing the photographer to get closer to or further away from a subject without physically moving. This feature can be achieved through optical zoom, which uses the lens elements to magnify the image, or digital zoom, which crops the image and enlarges it electronically. Zoom is commonly used in various types of cameras, including DSLRs, mirrorless cameras, and smartphones. It helps capture distant subjects, such as wildlife or sports events, while also allowing for detailed close-ups of objects or people, enhancing the versatility of photography.