Here we explain what they mean:
Private Label Rights (PLR)
Private Label Rights is a license to a product. PLR gives the user the right to do just about anything they’re wanting to do with it. For example, you can edit it, change the content, label it as your own (meaning claim authorship of it), and sell it. This license usually means you can do just about anything you are wanting to do with it (Please read the particular product’s full license for further details).
Master Resell Rights (MRR)
Master resell rights is a license that gives you 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 as you did. In Some cases, it also allows you to pass on master resell rights to your customers.
Resell Rights (RR)
Resell rights mean that the particular item can be re-sold to any number of customers. There are such boundaries with RR licensed products such as you cannot resell the product with resellable rights, meaning, you can only sell the product ‘as-is’ and cannot pass on or resell the product with a resalable license to your customers.
Personal Use Only (PUO)
Personal Use licenses can only be used for personal affairs, such as reading, sharing (only if stated), or teaching. Products with PU cannot in any way be resold or changed as this license restricts such acts. With personal use licenses, you may make an unlimited amount of backup copies. In most cases, unless stated within the license itself or within the product, it cannot be distributed.
Give Away Rights (GAR)
Give Away Rights is basically all digital products that have the rights to share, distribute across the internet, give away to your subscribers on a mailing list, and basically anyone who is wanting a free product, you may give away freely. These products might even come with sale rights but it is not necessary to sell these products if you’re just wanting to give them away for free.