Webcams are small digital cameras used to capture and transmit video footage over the internet or computer network. They are commonly used for video conferencing, online education, live streaming, and video blogging. Webcams can be built-in to laptops, tablets, and smartphones, or they can be standalone devices that connect to a computer via USB or other interface. Features to consider when choosing a webcam include resolution, frame rate, field of view, zoom capability, low-light performance, and built-in microphones. Many webcams also offer additional features such as autofocus, face tracking, and background removal.