Verified answer

They can't deliver it at the current time, for whatever reason. Your MacBook Pro won't get to your until they have the clearance to deliver it to you. This will happen when it doesn't say either "clearance delay" or "shipment on hold." It'll probably say something like "delivery in progress" or something. Just wait, I'm sure you'll get it within the next 3-7 days, wherever you live...

It means just what it says: a hold has been placed on your shipment, and it won't be delivered until that hold is lifted.