A bay window is a type of window that protrudes from the main walls of a building, creating a small alcove inside. Typically composed of three or more panels, bay windows allow for more natural light and provide a wider view of the outside. They can enhance the aesthetic appeal of a home and often serve as a cozy nook for seating or plants. These windows are commonly found in residential architecture, especially in styles like Victorian and Georgian. Bay windows can be made from various materials, including wood and vinyl, and can be designed to match the overall style of the house.