As Vend is the master in the Vend - Shopify integration, product management needs to be completed in Vend. Any changes/updates to products in Vend will force them to update in Shopify also. An example of this is if you have set up formatted descriptions in Shopify for Product A but no description in Vend. If you make any changes to Product A within Vend, like changing the price or name, it will push the updates to Shopify including the empty description which will overwrite the formatted description.
The four things that can be edited in Shopify without breaking this link are below:
- Shipping Weight
- Compare at Price