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 are often found in living rooms or dining areas. These windows can be made from various materials, including wood, vinyl, or fiberglass, and can be designed in different styles, such as Victorian or modern. Bay windows can also increase the usable space in a room, making them a popular choice for homeowners looking to improve their living environment.