A business owner reads that crypto transactions are final and cannot be reversed. What does this mean for day-to-day operations?

With card payments, a customer can dispute a charge and the card network can claw the money back from the merchant. That does not happen with crypto. A completed payment stays completed. If a refund is due, the business sends it directly to the customer. No third party steps in to reverse it. For most small businesses, that removes the cost of fraudulent disputes. The refund route stays open: a merchant who chooses to refund does so directly as a new payment.