Koha is like a very special bookshelf that libraries use to help organize their books, so that people can easily find the books they want to read. But unlike a regular bookshelf that you might have at home, Koha is very smart and can do lots of things all by itself!
When a library gets a new book, they add it to Koha's special bookshelf so that everyone knows it's there. But Koha doesn't just remember the book's title and author like you might, it also keeps track of lots of other important information - things like how many copies of the book there are, where the book is located in the library, and even when the book is due back!
When someone wants to borrow a book from the library, they can tell Koha what book they want and Koha will show them where to find it. Koha can even help keep track of when the book is due back, so that the person doesn't forget to return it on time.
But what's really cool about Koha is that it can also help people find books that they might be interested in reading, even if they don't know exactly what book they want! Koha can suggest books based on things like what other people have read and liked, or what kinds of books are popular at the moment.
So basically, Koha is like a super smart bookshelf that knows everything there is to know about the books in a library, and can even help people find new books to read!