A guest book is a book or digital platform where visitors can leave their names, messages, or comments. Often found at events like weddings, parties, or in hotels, guest books serve as a way to remember who attended and their thoughts about the occasion. They can also include spaces for photos or drawings, making them a cherished keepsake for hosts. In addition to personal events, guest books are commonly used in places like museums and national parks to gather feedback from visitors. They help organizations understand their audience better and can provide valuable insights for future improvements or events.