Product recommendations
Typically optimize for average order value using bestsellers and collaborative filtering. Great for discovery — not designed to clear specific SKUs.
Inventory-aware cart upsells
Optimize for inventory outcomes: move slow variants, recover cash from dead stock, track which pairings actually paid off. StockLift shows the widget only when the trigger SKU is in cart.
Frequently asked questions
Should I use cart upsells or related products on Shopify?
Use both for different jobs: recommendations for discovery, StockLift cart upsells for slow-moving inventory with scoped discount codes.