Master Resell Rights (MRR) is a type of licensing agreement often used in the sale of digital products, particularly in the context of e-books, software, and other digital goods. When a product is offered with MRR, it means that the purchaser not only has the right to use the product personally but also has the right to resell it to others. Additionally, the buyer can grant the same reselling rights to the people they sell the product to.