Primary and secondary trademarks are a trademark classification based on the primary and secondary status of the trademark, that is, multiple trademarks are used on one product. Among them, the main trademark plays the role of distinguishing the source of goods and commending the quality of goods, and plays the main role of highlighting the corporate brand; the sub-trademark plays the role of expressing the use, function, specification, ingredients, technology and other information characteristics of specific goods, and plays the role of Advertising and promotion and other secondary functions. The generation and application of primary and secondary trademarks originate from the primary and secondary brand strategies in brand strategy.

The use of sub-brands (sub-trademarks) can effectively improve the unchanging market positioning and consumer impression of the main brand (main trademark), give the main brand a sense of youth and growth, and enhance various reputation indicators of the main brand. Such as: affinity, technical sense, high-end sense, modern sense, fashion sense, etc.