Camera-ready means that a document or image is ready to be printed or published. It's like a chef making the perfect dish and then presenting it to the restaurant for serving.
When creating something that will be printed, like a poster or a book, it's important to make sure everything looks just right before it gets printed. This is where the term "camera-ready" comes in.
Imagine you drew a picture with markers or created a story on a computer. Now, you want to share it with others by printing it out or putting it in a book. Before you do that, you need to make sure it's absolutely perfect. That means fixing any spelling errors or making sure the picture looks exactly how you want it to.
Once all those changes have been made, your picture or story is camera-ready. This means that the person printing it can simply take it and put it straight into the printing machine. No changes need to be made because you've already done all the work.
So, to sum up, camera-ready means that something you've created is ready to be printed or published without any further changes.