The uses of coupons and discounts by using them

Hey guys, i guess so many of you will be wondering what are coupons and what are the uses of coupons i have some knowledge to share with you guys regarding what are coupons and what are the uses of it
1.In some websites like this they have some exclusive coupons that are not found in any website and the coupons actually work.
2. The coupons that they have all have 50% Off discounts and all are working and they also have extra cashback.
 
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