This setting refers to when the code is generated.
Dynamic Generation - A unique code is generated for each user. This is generated through Punchh.
Pre-Generated - All users receives different codes which are pre-generated by the system. This can be decided on by the business.
For Example:
If there are 6 guests and then the pre generated codes for them can be of the below series::
Guest 1 : ABC120
Guest 2 : ABC121
Guest 3 : ABC123
Guest 4 : ABC126
Guest 5 : ABC129
Guest 6 : ABC134