The feature of contact synchronization from the AVADA Email Marketing app to Shopify is available in the Pro package.
Follow these below steps to enable or disable this feature.
Go to App > Integration
Click on the Toggle button to enable synchronizing contacts from the app to Shopify
If this feature is enabled, when updating customer information in the app, the customer information in Shopify will also be updated.
If this feature is disabled, when updating customer information from the app, that customer information in Shopify will not be updated.