An integrated payment gateway allows you to keep the user at your website during the purchase. Non-hosted payment gateway providers allow for integrating via APIs. The pros are that you have full control over the transactions at your website
What is a payment gateway and how does it work?
Payment gateway is a third-party between merchants and customers that securely take the money from customers and send it to merchant's' bank account. Payment gateway is a virtual equivalent of a physical point-of-sale terminal that located in most of retail outlets
What is Payment Gateway API?
Payment Gateway API is the service that automates the payment transaction between the customer and merchant. It is usually a third-party service that process, verify, and accept or decline credit card, debit card and Net banking transactions on behalf of the merchant through secure Internet.