A garage door is a large, movable barrier that provides access to a garage, which is typically used for parking vehicles or storing items. These doors can be made from various materials, including wood, steel, and fiberglass, and come in different styles, such as sectional, roll-up, and swing-out. Garage doors are operated manually or automatically, with electric openers being common in modern homes. They often include safety features like sensors to prevent closing on objects or people. Proper maintenance is essential to ensure their functionality and longevity, making them a crucial part of home security and convenience.