It’s an advanced reloading feature to help you enjoy a seamless payment experience with your eWallet. You now no longer have to worry about insufficient balance to complete a transaction. You can make payment with the exact amount as long as you have a saved bank card.
Below are the articles that may be useful for you :
What can I use Quick Payment for?
How do I know my Quick Payment transactions are secure?
Do I earn reward points and/or cashback from my bank for transactions with Quick Payment?
How do I set up Quick Payment?