Trade Account lets business buyers add their account number, PO, and other details at checkout. Show the fields when a buyer opts in as a business account, or always. Add multiple fields, each with its own label, required toggle, and optional regex validation. Matching orders are auto-tagged, and each value is saved as a pinned order metafield, visible in admin and on exports. Review them in the in-app dashboard. Set up in under a minute, no code. Requires Shopify Plus.