A vestibule is an enclosed entryway or small room located at the entrance of a building. It serves as a buffer zone between the exterior and interior spaces, providing several practical benefits. Vestibules help in controlling temperature by preventing the direct flow of cold or hot air into the building, enhancing energy efficiency. They also serve as a security measure, limiting unauthorized access by creating an additional barrier. Vestibules often feature doors, windows, and signage that can convey essential information about the building, such as operating hours, emergency procedures, or branding. These transitional spaces create a welcoming and organized entry point, making a positive first impression on visitors and customers.