A photo book is a collection of photographs compiled into a single volume, often featuring a specific theme or event. These books can be created digitally or physically, allowing individuals to preserve memories, showcase their photography, or tell a story through images. Many people use photo books for special occasions like weddings, vacations, or family gatherings. They can be customized with captions, layouts, and designs, making each book unique. Popular services for creating photo books include Shutterfly, Snapfish, and Mixbook, which offer user-friendly tools for designing and printing these keepsakes.