In this video, you'll learn how to do the two key steps in setting up for VPP license distribution, primarily used for iBooks (device-based distribution is recommended for apps).
1. Assign users to devices
2. Send and accept a VPP invitation for each user/device
Note that if you are using Managed Apple IDs through Apple School Manager and Shared iPad Mode on your iPads, these steps are not necessary. This is because ASM users are automatically enabled to receive VPP licenses from the organization (since the organization owns the accounts), and logging into a shared iPad assigns the user to that device for that session.