third party seller on amazon refers to any independent individual or business that lists products on the Amazon marketplace. These sellers can use either Fulfillment by Amazon (FBA) or Fulfillment by Merchant (FBM) depending on their strategy. Third-party sellers make up a significant portion of Amazon’s product offerings and contribute greatly to its diversity and pricing competition. Building a successful third-party business on Amazon requires understanding the platform’s rules, optimizing product listings, and maintaining excellent customer service to build positive reviews and trust.