AE (Automatic Exposure) metering is a camera feature where the camera measures the amount of light in a scene and automatically adjusts the exposure settings, such as shutter speed, aperture, and ISO, to achieve a correctly exposed image. This system allows photographers to capture well-balanced photos quickly and efficiently without manually calculating exposure, making it especially useful in changing lighting conditions or fast-paced shooting environments. AE metering is widely used in digital cameras, DSLRs, mirrorless systems, and advanced compact cameras, helping both amateur and professional photographers produce consistently accurate exposures across a variety of scenes.