Notify shoppers when an item is added to their cart by providing a prominent confirmation message on the same product page or redirecting them to the cart page. Allow users to easily edit quantities and options of cart items directly or through a quick look feature without navigating away. Provide clear options to remove items from the cart by a remove link or setting the quantity to zero and confirm intentional removals. Save abandoned cart contents for a few days in case users return and greet returning users with their previous selections and any price changes.