The Link to PromoSync bulk action registers the products you select in Shopify’s products list with PromoSync’s backend. Once registered, every subsequent sync (inventory, prices, metafields) can target each product directly instead of rediscovering it from the catalog.
This action was previously called Sync Duplicate Products.
Looking for the version that processes your whole catalog in one go? Open Apps > PromoSync > Quick Sync and use the Link to PromoSync card there. The bulk action documented here only touches the products you select in Shopify’s product list.
For routine maintenance, periodic safety nets, or bulk Matrixify imports across the whole store, use the Quick Sync card on the PromoSync dashboard instead.
... button, then Apps > Bulk Product Sync.The job runs in the background. Products that are already in PromoSync’s registry are quietly ignored, so re-running is safe and cheap.
For the full explanation of what gets registered, how extra_id is resolved, troubleshooting for “could not determine extra_id” errors, and when each trigger is the right one, see the main guide: