How to offer free shipping on standard shipping only, not express
Why a discount code removes free shipping, and how to stop it
Replacing Shopify Scripts shipping discounts
Shopify's free shipping discount vs RM: Advanced Free Shipping
Free shipping on specific products or collections, or excluding some
Free shipping by state, ZIP code or postcode
Free shipping for VIP, wholesale or first-time customers
Percentage or fixed amount off shipping, not just free
