Sometimes a book description isn’t enough to give you an idea of what it’s about and we’re strong believers that the best recommendations and descriptions come from readers who love the books and know their content inside out. Did a book make you cry? Do you want us to know it’s about zombies? Leave tags for other readers to get a better idea of the book’s contents. Tags also help us serve you better book recommendations. and are pulled into the personalized bookstores as curated boxes that group books from across genres under common tags.