An event guest book is a book or digital platform where attendees of an event can sign in and leave messages. Commonly used at weddings, birthdays, and corporate events, guest books serve as a keepsake for hosts to remember their guests and the occasion. They often include spaces for names, messages, and sometimes even photos. In addition to traditional paper formats, many events now utilize online guest books or social media hashtags to collect messages and photos from guests. This modern approach allows for greater creativity and accessibility, enabling hosts to compile memories in a more interactive way.