How does Unity use the Android Market Licensing (LVL) Public Key entry in player settings?

This isn’t a “how do I use android LVL”. I already am aware of that. I noticed this field in the player settings but it’s not documented (or I can’t find documentation) anywhere on how this field is used at all.

Anybody know?

File → Build Settings → Player Settings → Publishing Settings → Android Market Licensing (LVL)