How to add collection banner by metafield?

From your shopify store admin –> Click Settings –> Custom data –> Click Collections

Click on “Add definition” and add data as below

Name: Banner Image
Namespace and Key: my_fields.banner_image (Must use – my_fields.banner_image )
Content type:File (Only accepts images )

Now go to product collections, scroll down to “Metafields” and upload banner image