Brand authorization, also known as brand license, means that the licensor grants the trademark or brand owned or represented by him to the licensee in the form of contract; The licensee engages in business activities (usually producing and selling a certain product or providing a certain service) according to the contract, and pays the corresponding expenses-royalties to the licensor; At the same time, the licensor gives guidance and assistance in personnel training, organizational design, operation and management. Brand authorization is no longer an academic field studied by a few special people. Many enterprises regard brand authorization as an important tool of marketing. It can even be said that brand authorization has become one of the most powerful effective methods of marketing and brand extension in modern times, and it has been applied in an increasing number of ways.