Cross-Sell and Upsell Engine Overview Cross-sells and upsells generate 10–30% incremental revenue with minimal customer acquisition cost. Every major e-commerce platform has apps that handle the recommendation logic without custom code. The key decisions are: which placement to start with (PDP, cart, or post-purchase), what recommendation logic to use (manual bundles vs. algorithm-based), and how to avoid checkout friction. Start with one placement and measure before expanding. When to Use This Skill - When average order value (AOV) is below industry benchmarks and you want to grow it without…