How does the product recommendation carousel work?
If you are choosing to activate the product recommendation carousel on the site, it will influence the shoppers to make a purchase by showcasing products they've shown interest in. AdRoll provides relevant recommendations based on the shopping activity on your site within the past 30 days.
You can design and enable this carousel by navigating to the Recommended Products tab under Customize your website in the left navigation menu.
For more information, check out What are Product Recommendations?