A digital guest book is an online platform that allows guests to leave messages, comments, or signatures for events such as weddings, parties, or memorials. Unlike traditional paper guest books, digital versions can include multimedia elements like photos and videos, making them more interactive and engaging. These guest books can be accessed via websites or apps, enabling guests to sign in from anywhere. They often feature customizable designs and can be easily shared with friends and family, ensuring that memories are preserved in a modern and accessible format.