Payment Gateway refers to an e-commerce service that authorizes payments for e-businesses & online retailers. In a way, it represents a physical POS (Point-of-sale) terminal located at most retail outlets. Payment gateways encrypt sensitive information, such as credit card numbers, to ensure that information passes securely between the customer and the merchant.
The Payment Gateway is needed to be acquired by the owner of the site and the integration of the same in to the website is performed by us. There exists various types of Payment Gateways, & since it requires varying amount of effort in integrating; so cost for integration of each Payment Gateway varies accordingly.