Marketplace integration connects a retailer's systems with online marketplaces, so product listings, stock levels, prices and orders flow automatically between them and the retailer's own POS and website.
An integration layer reads stock and product data from the central system, publishes it to each marketplace, and brings orders back so they can be fulfilled and recorded. Updates run on a schedule or in near real time.
It reduces double entry and the risk of overselling an item that has already been sold in store or on another channel. Retailers can reach more customers without managing each platform by hand.
Check the fees and rules of each marketplace, and map product categories carefully. A well-planned integration keeps one source of truth for stock and pricing.