In Turbo 4.0 and up, you can enable a 'Featured Collection' on the cart page. If you are on a previous version of Turbo and would like to use this feature, you will need to update your theme.
Adding a Featured Collection on the Cart Page
This new feature provides a built-in option to allow you to cross-sell products on the cart page! You'll be able to choose which additional items will show up by configuring a new collection. This is a great way to highlight new products or ones that are on sale!
Enabling the Featured Collection for your Cart Page
First things first! You'll need to create a new Collection of items that you'd like to cross-sell and be included on the cart page. Shopify has instructions on how to create a collection here.
After you've put together your collection, you can add it to the cart page!
Head into Customize > Click the Cart icon/button so you navigate to your Cart Page > Under Sections > Cart Page > Click 'Add Featured Collection'.
You can then select your collection, configure the heading, choose between a 'slider' and 'grid' layout, enable/disable the collection's description, limit products and choose products per row.