Either you are shopping on an E-commerce site or Transacting with your Debit card, you should have faced the trouble going to a Message note the OTP  (One-Time Password)and enter it in the transaction page.

Solution:
whenever you receive an OTP, you will be displayed a floating notification the OTP is displayed in different color and an option Copy OTP on the right. So just tap on Copy OTP and paste it without the need to move from your current screen.
Quick OTP should be enabled by default.