
The bottom line
A default checkout often adds steps, omits wallets, and handles webhooks naively. Each has a direct cost: abandoned carts at the highest-intent moment, mobile buyers lost for want of one-tap payment, and the operational nightmare of orders whose paid/unpaid state does not match the payment provider. Done properly, payment integration lifts checkout conversion, keeps finance and operations sane through reliable reconciliation, and reduces fraud and chargeback exposure — typically a strong return given checkout is the highest-leverage point in the funnel.













