Difference between product key and activation code - Microsoft Support

An activation code or serial key is typically required to unlock the full features of the FaceOnBody software. The serial key 31 might be a specific code used to activate the software.

Here are a few concise phrasings you can use:

: Users can save their creations locally or share them via email . Activation and Serial Codes

: If purchased as a physical product, the serial number is typically located on a label on the box or warranty card.