How do I setup cross-sell on a product?
What is Cross-Sell?
Cross-sells are products that you promote in the cart, based on the current product.
They are typically complementary items. For example, if you are selling a laptop, cross-sells might be a protective case or stickers or a special adapter. Or if you’re selling a ninja t-shirt, they could be a ninja hoodie and ninja socks.
Depending on your theme template, they display on the cart page underneath the cart products table with a thumbnail image.

1. Go to Products and then All Products

2. Select the product that you would like to add the cross-sell to.

3. Scroll down to Product data and click on Linked Products and then start typing the name of the product that you want to cross-sell.

4. You can add as many as you would like. Once done make sure to save your product.

This is what it will look like on the product once the customer is viewing their cart.