The free shipping note marks products with free shipping in the buybox.
Free shipping
The status "Free shipping" is fulfilled in Shopware if a product is configured as "Free shipping”. You can find more information in the Shopware documentation.
Go to the "Product pages" tab
Expand the "Delivery information (in the buy box)" block
Scroll to the section "Free shipping"
Enable the configuration "Show 'Free shipping'"
Save your changes after editing
Tab "Product pages" => Block "Delivery information (in the buy box)" => Section "Free shipping" => Show 'Free shipping'
twt.detail.shippingFreeLabel