A payment gateway is technology that allows merchants to accept online payments or various other methods of payment. It acts as intermediaries between the client and merchant secures debit and credit card, as well as other transactions through encryption of sensitive information like card numbers. They ensure that the data transfers in a safe manner between the site of the merchant or its the point of sale software as well as the financial institutions that are that are involved. Most commonly used for e-commerce transactions the payment gateway is used to authorise payments and ensures that consumers can purchase easily and safely across all the internet.