Cart discount field
Field for a discount code in the cart is a great way of encouraging customers to reach checkout by offering them a discount right away in the cart.
You can add it both in the cart drawer and cart page. Here is how:
Add discount field to cart drawer
Click on Theme settings > scroll down and click on "CART" section. Scroll down and click on Show cart discount field.
Add discount field to cart page
Go to Cart page and inside the "Subtotal" section add the "Discount field" block (place it above "Subtotal price" block).