My password

I personally would likely just do what my iPad instructed and go to Settings and add my Apple ID password.

If you are concerned, about doing that however, use the Contact Support button at the top of this page, or call them at: 1-800-MY-APPLE to put your mind at ease.

What are you doing when it asks for it?

Are you asking about your 4 or 6 digit passcode you use to open the iPad when you turn it on or the Apple ID Password? They are totally different.