A video doorbell is a smart device that combines a traditional doorbell with a video camera. It allows homeowners to see and communicate with visitors at their door through a smartphone or tablet. The device typically includes features like motion detection, night vision, and two-way audio, enhancing home security. When someone presses the doorbell, the homeowner receives a notification on their device, enabling them to view a live video feed. Many video doorbells can also record footage, providing a visual record of who visited the home. Popular brands include Ring, Nest, and Arlo.