By definition, a custom field is any field in your Data CSV that does not get mapped to a Shotfarm Core Field and is automatically created when you activate your Master or Append Data CSV.
Content is king, and retailers consistently ask their partners to provide more detailed product information. You can create and share unlimited product categories and related product attributes simply by uploading a product spreadsheet. Custom Fields can be used to create, manage, and share product attributes such as Country of Origin, Marketing Descriptions, Feature/Benefits, and Instructions. Any number of custom fields can be created in your account.