(PU) Personal Use
Personal Use licenses can only be used for personal affairs, such as reading, sharing (only if stated), teaching. Products with PU cannot in anyway be resold or changed as this license restricts such acts. With personal use licenses you may make a unlimited amounts of backup copies. In most cases unless stated within the license itself or within the product, it cannot be distributed.
(CU) Commercial Use
This license allows you to distribute the product for your client's projects where you charge a price for your time and work. You can use a product with this license by you or any number of clients which the end-users (client) can be charged for.