merchant fulfilled refers to a fulfillment model in which the seller is responsible for storing, packaging, and shipping products directly to customers. Unlike Amazon FBA (Fulfilled by Amazon), where Amazon handles the fulfillment process, merchant-fulfilled orders are entirely managed by the seller. This allows sellers more control over inventory and shipping processes but can also require more time and effort. Merchant-fulfilled is often preferred by smaller businesses or those who want to maintain full control over their operations and shipping processes.