Xcode 5 asset catalog: What is “Default” image set

Question

My asset catalog contains an image set Default :

Can I delete this image set?

Where does it come from? (I have migrated my artwork from a previous Xcode version into Xcode 5 asset catalog).

What kind of image do I need to provide for this placeholder?

My app is iPad only and targets iOS 7 only (no previous versions).

Answer 1

Default.png is your splash image. You can find it in project settings. You have to replace it with your splash image in order to be approved when you upload to appstore.