amazon fba definition refers to the business model known as Fulfillment by Amazon (FBA), where sellers send their products to Amazon’s fulfillment centers. Amazon then takes care of the storage, packaging, and shipping to customers. FBA is a popular option for sellers looking to scale their businesses because it allows them to focus on sourcing products and marketing while Amazon handles logistics. Additionally, FBA gives sellers access to Amazon’s customer service and returns processing, which improves the overall customer experience.