Amazon brand association refers to the association between a brand and multiple store accounts on the Amazon platform. This association can be in the form of authorization, that is, the brand owner authorizes its brand to other stores so that these stores can sell the brand's products. Brand association is a common practice on Amazon, especially for sellers who want to expand their brand influence and market coverage.

Based on the search results, here are some key points of Amazon brand association:

1. **Brand protection**: Brand association can help sellers protect their brands from being abused or copied by unauthorized third parties.

2. **Multiple store use**: Brand owners can authorize their brands to multiple stores, which helps brands expand their sales network on Amazon.

3. **Brand registration**: In order to conduct brand association, brand owners need to register their brands on Amazon and provide the necessary trademark information and certification materials.

4. **Authorization management**: Brand owners can manage the authorization of their brands through the Amazon Brand Registry backend, including adding or removing authorized stores.

5. **Risk**: If an authorized store’s account is frozen due to illegal operations (such as infringement, fake orders, etc.), it may affect the account security of other associated stores.

6. **Trend**: Amazon’s policy tends to be “single store single brand”, which means that in the future it may be more inclined to have a one-to-one correspondence between stores and brands, which may have an impact on sellers operating multiple stores.

7. **Brand Tools**: Amazon provides a series of brand tools to help sellers operate in terms of brand strategy, brand image, brand growth, brand users and brand protection.

8. **Brand Registry**: Amazon Brand Registry is a project that helps sellers protect their brands and enhance brand influence.

Brand association is part of brand management on the Amazon platform. It allows brand owners to more effectively control the display and sales of their brands on Amazon, while also requiring sellers to pay attention to compliance and risk management.