Amazon's storage and fulfillment service, known as FBA (Fulfilled by Amazon), FBA Seller enable to submit merchandise to an Amazon warehouse and have Amazon ship their orders. In the FBM (Fulfilled by Merchant) fulfillment method, the seller assumes complete liability for stock management and order delivery. Amazon charges a fulfillment fee and a monthly inventory storage fee when you use FBA. You can either handle the storage and shipping of the goods yourself with FBM or contract out the task to a third party (not Amazon). Choosing a method can be challenging if you don't know the advantages and disadvantages of each software.