Payment gateway integration is essential nowadays for every e commerce business because it allows users to make purchases from anywhere in the world.In simple words, a payment gateway is a platform that allows you to transfer money online from your bank account to the merchant’s account. It is a software which facilitates you in doing transaction according to your convenience, there are various online payment modes available like debit cards, credit cards, net banking, UPI and wallets etc. You can choose anyone one of them and perform transaction safely.
Not only this, payment gateway is also responsible to maintain privacy and security while doing the transaction through your bank account by encrypting your bank account details.
Suppose a user has made a purchase of mobile phone through an e commerce site, after confirming the order, user presses the checkout button to place order, then the website will take him to the payment gateway page where he/she has to select the convenient payment mode and has to put all the bank account details for transaction. After that, the payment gateway takes the user to a 3d secure page to ask for approval.
After the approval, the bank now checks whether the customer is having sufficient funds in his account or not, if yes then your payment gets succeeded. If no, then the user receives a message of error in transaction.