With one-step (aka single-step) checkout, your customer enters all the information pertinent to their order on one page and then completes their purchase quickly with one click.
Multi-step checkout is more of an ongoing process, usually with a progress bar showing the customer where they are in the steps, including account creation if necessary. Clearer but a little slower, this type of checkout typically asks customers to enter information on different pages, which may include shipping address, billing address, and payment method.
NEXT BASKET lets you select which type of checkout is best for your business and its customers.