How to Add custom fields to Webflow schema markup

1. Open the JSON Schema App dashboard.
2. Go to Manage Schema → Product.
3. Select the product you want to update, then click on Edit Schema.
4. Click on Add Field to include additional attributes like Brand, GTIN, MPN, Color, Size, or Material.
5. Enter the required details and click Save Schema to apply the changes.

Once saved, the app will automatically update the JSON-LD structured data for that product in the background.