This product showcases how Upsell Funnels work. It's an exciting new feature that allows you to show different offers based off how customers interact with them.
If they accept an offer, you can then offer them something else, if the don't accept it you can offer a downsell (offer something similar but less expensive).
Go ahead and click "Add to Cart" this product and first decline each offer. Then do it again but accept each offer. You'll see how it's a different funnel for each customer interaction.