Amazon FBA, or Fulfillment by Amazon, is a business model that might seem attractive. Basically, if you decide to sell a certain product through Amazon, the deal is that you send your product to Amazon for storage and distribution, properly packaged. From then on it is your job to promote your business and find new clients, while Amazon does the practical things like handling orders and sending the products. There are, of course, fees for this service, as well as fees for storage.
But you should bear in mind that going into this line of business may bring some purely bureaucratic setback to you. There are Amazon’s strict rules to consider, there are sales tax and VAT regulations in different EU and non-EU countries, and there is personal responsibility for faulty or dangerous products.