Ans: once you get the coupon. when u process check out,below it u can see one space saying:enter code .then just enter code u have.
if u want to buy game item/powerleing/gold/cdkey you can use this 8%coupon code :IGXECODE69562
4%discount code:IGXEQZMG8733
website: www.igxe.com/-Affi-IGXE-5892.html