Thrive Vendors are used internally to organize vendors in one place, assign products to vendors for reporting, and re-order products using Purchase Orders.

The main vendor field in Thrive, visible on the Vendors page and the Product Details page, is for internal management purposes and does not sync with Shopify.

There is a Brand/Vendor field that WILL sync to Shopify once enabled from the Settings>Integration tab. The Brand/Vendor field in Thrive is a Shopify-specific field, different from the vendor field used for Purchase Orders and reporting.

This field can be edited from the Product Details>Integrations tab or in Bulk with the Edit Products for Shopify Spreadsheet