Cross-sell items are similar to impulse purchases positioned next to the cash register in the checkout line. Products offered as a cross-sell appear on the shopping cart page, just before the customer begins the checkout process.
To show or hide cross-sell items per store view, see the Store > Configuration > Sales > Checkout > Shopping Cart option called Show Cross-sell Items in the Shopping Cart. You may want to hide cross-sells during specific sales or for A/B testing in a store view.
Cross-sells in Shopping Cart
To select cross-sell products:
Open the product in edit mode.
Scroll down and expand the Related Products, Up-Sells, and Cross-Sells section. Then, tap Add Cross-Sell Products.
Add Cross-Sell Products
Use the filter controls to find the products that you want.
In the list, mark the checkbox of any product you want to feature as a cross-sell product.
When complete, tap Add Selected Products.