How do I drive discount tiers from a metafield?

If an ERP or PIM already owns your volume pricing, the app can read tier quantities and discounts from a product metafield instead of you typing them into every deal. Turn on “Populate tiers from metafield” in the deal’s Metafields section. The app then reads the JSON metafield custom.volume_discounts, in the shape [{"min_qty": 12, "discount_percent": 2.0}]. The deal still owns everything visual: labels, badges, layout, colors. One deal can therefore present tiers that differ product by product, which is how wholesale price lists usually work. Metafield-driven tiers are part of the Professional plan.

Steps

1. In Shopify, define a product metafield with namespace custom and key volume_discounts, of type JSON, readable by the storefront.
2. Have your ERP or import write the tier list to it, for example [{"min_qty": 12, "discount_percent": 2.0}, {"min_qty": 24, "discount_percent": 5.0}].
3. In the app, open the deal and choose Metafields in the settings rail.
4. Turn on “Populate tiers from metafield”. Metafield namespace and Metafield key are shown read-only. “Manage metafield definitions” opens the matching screen in your Shopify admin.
5. Set “Quantity field name” and “Discount field name” to the keys used in your JSON.
6. Choose a product and use “Refresh preview tiers” to confirm the app reads what you expect.
7. Set the labels, tags, layout and design on the deal as usual. None of those come from the metafield.
8. Save the deal, then check a product that carries the metafield on the storefront and through a test checkout.