Automatic Discounts with Cross Sell
How it works
With Shopify's Discounts feature you are able to setup Automatic Discounts, which can be advertised with our app's headers and linked to any or all items setup as cross sells (we recommend using our Global Product or Global Cart Cross Sells for this).
Three types of discounts are possible to setup: percentage based, fixed amount or "buy X get Y" discount/offers.
The Automatic Discount will be applies in the cart and and at checkout :)
You can read more about setting up discounts here: https://help.shopify.com/en/manual/discounts/automatic-discounts or by watching the video below.