Fast Lane Checkout is a type of checkout in which every step of data submission takes place on a separate page, i.e. a customer submits personal data and selects preferred delivery and payment methods in series. Each next step becomes available only after all the required fields of the previous step have been completed. Fast Lane checkout is considered a more straightforward method for a new customer. It potentially leads to fewer errors during the submission of data for a transaction because all required info is submitted in portions.
This is how Fast Lane checkout looks for an unregistered and not logged-in customer:
For a logged-in customer, the process becomes a bit shorter, since all personal data (shipping and billing addresses) predefines based on a customer account info. The preferred delivery and payment methods also display pre-selected based on the previous order of this customer. The logged-in customer will only need to check the fields and then pay for an order.