Advanced Source
Advanced source allows you to add custom descriptions and display product/variant custom metafield values. Advanced source can only read metafields from Products and Variants.
Basic Metafield Syntax
To add a metafield, add :: in front of your metafield namespace and key. For example:
::namespace.key
::product.dimension
Custom Text with Metafields
You can also add custom text together with your metafields:
The product dimension is ::product.dimension
Multiple Metafields
Advanced source also supports multiple metafields:
The product dimension is ::product.dimension and weight is ::product.weight_in_kg
Dynamic Values
If the product has variants, metafield values update automatically when a variant is selected.

