I need to add additional fields to a product (beyond the ones Shopify provides). Ideally, it would be some sort of key-value that I can add to a product via API or CSV and that I can later retrieve in my storefront and admin. Is there any way to do this? Are metafields the way to go?
For example, I would like to add key-values for each product like: "marking-price-1-colors": "3", "marking-price-2-colors": "5" ... etc