Use the Sync Products button any time you change products in Shopify - names, SKUs, descriptions, images, weight, etc. - so PDQ stays consistent.
How to:
Go to Account Settings → Account → Sync Products.
Wait for the sync to finish - depending on catalogue size this typically takes 30-60 minutes.
💡 You only need to sync when changing existing products. Details for new products are pulled from Shopify automatically the first time they're ordered.

