what business category is amazon fba is categorized under e-commerce and online retail. FBA allows entrepreneurs to sell physical products online without the need for a physical store. Amazon acts as the retailer, handling storage, packaging, and shipping, while sellers focus on marketing and sourcing. As an online business model, Amazon FBA has attracted thousands of sellers around the world, particularly in the realm of niche products. This flexible model suits both small and large businesses looking to expand their reach on a global scale.