A "Sliding Door" is a type of door that opens by sliding along a track, rather than swinging open like traditional doors. This design is often used in spaces where saving room is important, such as in small apartments or patios. Sliding doors can be made from various materials, including glass, wood, and metal, and they are popular for their modern aesthetic and ease of use. These doors are commonly found in homes, offices, and commercial buildings. They can provide easy access to outdoor areas and allow natural light to enter a space. Additionally, sliding doors can enhance energy efficiency when designed with proper insulation and sealing.