(PLR) Private Label Rights
Private Label Rights is a product that offers one of the best licenses around. PLR gives the user the rights to do just about anything they are wanting to do with it. For example, you can edit it, change the content, label it as your own (meaning claim authorship of it), sell for what ever price you are wanting. This license usually means you can do just about anything you are wanting to do with it.
(MRR) Master Resell Rights
Master resell rights is a license that gives you the permission to pass on resell rights to your customers. If you download a product with master resell rights and then sell it, your customer may resell the product to obtain a product as you did. In Some cases it is also allows to pass on master resell rights to customers. Read further within the product itself, for example, such as within the start of the book if it is an ebook.
(RR) Resell Rights
Resell rights mean that the particular item can be re-sold or onwards selling to any number of customers. There could be such boundaries with RR products such as reselling the product at a certain price. This does not mean you can not resell the product a limited time or amounts, you still sell the product unlimited amounts and to keep 100% of the profits of your sales. In most cases, when you sell a resell rights product you the original license, usually stating that “personal use” only of the next customer.
(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.