Fulfillment By Amazon (FBA) is a service that allows sellers to store their products in Amazon warehouses. When a customer orders a product, Amazon handles the packing, shipping, and customer service on behalf of the seller. This helps sellers reach a larger audience without managing logistics themselves. Using FBA can also enhance a seller's visibility on the Amazon platform, as products fulfilled by Amazon are often eligible for Prime shipping. This can lead to increased sales and customer satisfaction, as buyers appreciate fast and reliable delivery options.