IF yes, you must follow the step by step guide.
Register a free account at SHOPBACK.
Use link below:
After that, install shopback buddy by using Google Chrome:
Go to https://www.saleduck.com.my/, search which online website you plan to buy.
For my case, I choose LAZADA.
You can get extra coupon code from Saleduck, excample:
Lazada 11.11 sale: Up to 90% off + extra 11% off voucher on Taobao collection - TBC11LAZ ( capped at RM 80)
What did I buy during 11. 11 sales?
I get extra RM 32.89 discount for the voucher code from sales duck.
This is exclude Shopback cash back and 6% public bank credit card cash back.