When the cart is saved between sessions — that’s an absolute must-have. People often add items on their phones and then complete the purchase later from their computers. Without this feature, they’d forget half of it. I also noticed that when stores combine this with something interactive — like product selection quizzes here the buying process becomes way more engaging. You take the quiz and there is no need to remember everything. Altogether, this really reduces abandoned carts, I can see it in my own store.