Vertical blinds are a versatile and practical window treatment option consisting of vertical slats that hang from a track at the top of the window. These slats can be tilted open or closed to control the amount of light and privacy in a room, and they can also be drawn to the side for unobstructed views.One of the key features of vertical blinds is their suitability for large windows, sliding glass doors, and other expansive openings. Vertical blinds are commonly used for large windows, sliding glass doors, and patio doors.