The most common way to get coupons on AliExpress is by visiting stores that are giving them out, or by viewing products being sold by those stores. For example, if you're browsing a seller's store, try clicking Sale Items.
Discount Coupons. Coupons are not valid with any other offers. Coupons must be used at the time of checkout and are not retro active to previous purchases.
Using online coupon codes or promo links when shopping online can be similar to utilizing paper coupons or shopping the sales at local stores. But unlike paper coupons that you hand to a cashier to redeem, online stores have a code to enter during checkout that relates to a specific discount and that amount is subtracted from the total purchase.