More than 95% of independent sellers in Amazon’s store sell across multiple channels. The same product can live as separate listings on Amazon, a seller’s own website, Shopify, eBay, Walmart, and TikTok, each governed by its own dashboard, rules, and blind spots. Managing orders, listings, and analytics across these channels is labor-intensive, and it pulls sellers away from developing products and serving customers. Sellers want a simpler way to run their business across these channels and one inventory pool to fulfill all of their customer orders, wherever those customers shop.
https://www.aboutamazon.com/news/small-business/amazon-seller-central-multichannel-selling-tools

