What happens when my customer clicks "Remove from cart"

We recommend keeping the "Remove from cart" button, especially if you are sending your customer to the checkout page (default)

When they click it, the app removes the item from the draft order. And your customer sees this message if they have other items remaining in their draft order:If their draft order is empty after removing the item, then the Checkout link isn't there since there is nothing in the cart to purchase:

If there was a waitlist for this item, then the next waitlisted person will get messaged an invoiced.