What does it mean it says windows 10 ready?

Aug 29, 2017
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I have recently bought the Asus z170 pro gaming mother board, and when I received it. It said "Windows 10 Ready" on the box. Im pretty sure it means that I can install windows without any problems, because of how all the drivers are ready for it. But i also had a thought that it could also mean that it has windows 10 already on it. Is this what it means, or was I correct with the first statement. Thanks for to any one who can straighten me out on this one.