What it is

The free-shipping nudge as part of the cart page itself, not a bar over it: "Add €40.00 more and shipping is on us" sits right where the shopper decides to check out, and updates as they add or remove items. Try it: open the Demo item - add it to your cart and the strip appears under its Add to cart button, filling as you add more, and the same strip waits in the cart above checkout.

When to use it

• You want the nudge at the moment of decision, without anything popping up.
• Your theme's cart page has room above the checkout button (most do).
• You already use a pop-up elsewhere and don't want two things competing for attention.

Why it works

A message that is part of the page is read like the page: nobody has to close it, so nobody resents it. Placed next to the checkout button, it reaches every shopper who is about to pay.