Currently, the only discount that can be applied to shipping rates is a free shipping discount. Fixed value or percentage discounts can not be applied to shipping rates. To modify your shipping rates, head to Settings > Shipping in your admin.
You can learn more about the type of discounts Shopify supports here.
If you have any other questions, feel free to reach out to our support. We're available 24/7!
You can offer discounts on products in Shopify. I am not sure about shipping in Shopify.
You can offer your customers discounts that apply automatically at checkout and on the cart. You can create a percentage or a fixed amount.
For an automatic discount to apply correctly, your customers need to add all eligible items to their carts before they move to checkout. This includes the items that they need to buy to qualify for the discount.
You can have only one active automatic discount at any given time. Automatic discounts take precedence over discount codes, and customers can't apply multiple discounts to a single order. Discount codes are unavailable for customers who have an automatic discount applied to their checkout.
In another method, with the help of a Multi-carrier shipping label app, these discounts are automatically taken into consideration to reduce the shipping costs by the percentage from the carrier. The carrier displays final shipping rates after reducing 25% of the original shipping rates.
To know more about the setting up and configuration of the app, you can contact the support team.