The Cart summary block shows the order total at the bottom of the cart. It gives customers a quick overview of what they'll pay before proceeding to checkout.
Cart summary is a required block — it's always on the page and cannot be removed, it can be hidden though.
Settings
Subtotal — Toggle on to show the subtotal before shipping and taxes. On by default.
Shipping — Toggle on to show a shipping line. On by default.
The total is always displayed regardless of these toggles.
Tips
If your offer includes free shipping, keep the shipping line visible so customers can see the value they're getting.
For simple single-product links, you might hide the subtotal to keep the summary clean — just the total is enough.