Amazon's nine categories refer to the nine main categories of goods on the Amazon platform, including books, electronic products, home kitchenware, clothing, shoes and bags, beauty and personal care, maternal and child products, sports and outdoor, food and health care, and auto parts. These categories cover the various needs of consumers in daily life, making Amazon a comprehensive online shopping platform. For sellers, choosing the right category can achieve better sales results and user experience, and it also helps to classify and manage the goods on the platform.