Imagine you have a bunch of papers with important stories or pictures that you want to keep together and be able to read again and again without worrying about them falling apart. To keep them safe and tidy, you might put them in a special cover with a spine and covers just like a book. This is what we call binding, and it helps keep all the pages organized and protected.
When a library binds a book, they do this process on a large scale with thousands of books in their collection. They use special machines and tools to glue the pages together, sew them into a tight spine, and then attach covers to make them look nice and easily accessible on shelves or in stacks.
Library binding is a way to make sure books stay in good condition, and also makes them easier for librarians to handle, move around, and lend out to readers. It's like giving all the books extra cozy jackets to keep them warm and snug.