Wǎnghóng zǒngshì zài shìpín lǐ fā zìjǐ de yōuhuìmǎ.
Influencers always post their own promo codes in their videos.
Tips
usage
优惠 means 'favorable, preferential', 码 means 'code' - a direct calque from English. Compare 优惠券 (coupon, the physical/voucher sense), 折扣码 (discount code), 红包 (digital cash gift, which can also act as a discount on platforms like Taobao).
