A Cart Page Cross-sell Popup Widget is a great way to display offers to customers when they navigate to the cart page, which asks if they would like to add more complementing items! A cross-sell is NOT an upsell (switching to a higher value alternative) but just asks them to add additional items.
Creating our Widget:
From the Rebuy admin, navigate to the Online Store tab. From here you can see the most popular locations you can upgrade your online store as well as a list of all created widgets. Select "Cart Page".
This quick start to this widget will start with 8 items to show and trigger on page load. The Data Source is set to return AI recommendations. You'll need to have these configured to cart subtotal rules. From here you'll just need to determine what you want the language of the widget to say, and what the offers(s) will be if you don't want to use the AI. To learn more about creating product or cart page rules for your new widget, check out this article. More on widget settings.