Coupang auction management for sellers who already hold the Item Winner on the SKUs they want to advertise, measured against WING sales exports, not dashboard ROAS.
About this service
The Item Winner decides everything:
Coupang shows one page per item and the seller holding the Item Winner takes the cart. Ads served against that page work for the winner regardless of who paid. I do not accept engagements where you hold the Item Winner on fewer than half the SKUs you intend to advertise, because the honest recommendation in that case is to put the money into price, delivery speed and stock reliability, which are what the winner selection reads.
What the retainer runs:
Manual campaigns where keyword control exists, and sales-optimised automatic campaigns where it does not. The automated surface does not hand back search terms, so what remains is item-group composition, budget pacing and target setting, and that is where the hours go. Weekly rebuilds of the item groups, separation of defence spend from acquisition spend, exclusion of items heading into stockout, and a bid stance that changes the moment Rocket status changes.
Rocket status is an advertising decision:
Whether an item ships through Rocket Growth or seller delivery moves both conversion and the probability of holding the Item Winner, which makes it part of the media conversation rather than a logistics footnote. I model which SKUs earn their inbound by the advertising economics they open up afterwards, and which are better left seller-shipped and unadvertised entirely.
Language, stated plainly:
WING is Korean end to end, and so are your listings, your tickets and your category correspondence. I read the exports, run the auction and write recommendations in English. I do not write Korean listing copy, negotiate with your Coupang BM, or answer customer inquiries. This engagement requires a Korean-speaking merchandiser on your side with WING access and authority over price. If that person does not exist, tell me on the first call and I will decline.
3P and 1P are different jobs:
If you also supply Coupang as a vendor, say so at the start. The ad surfaces, the margin arithmetic and the people you negotiate with are not the same, and I scope the marketplace side only unless we agree otherwise in writing.
Measurement:
Coupang's attribution window is generous and its reported revenue includes purchases already coming to you. Every eight weeks a matched item group comes out of spend for two weeks and the delta is read against your WING sales export. Where the delta is small, we cut the group and you keep the money. That has ended up cutting between eight and twenty percent of spend in the accounts where I have run it, without a revenue drop that survived the next cycle.
Not included:
Korean listing optimisation and copy. Coupang Eats, Play and cross-border programmes. Vendor negotiation and 1P terms. Review generation, which carries compliance exposure I am not prepared to advise on. Inbound logistics and 3PL selection.
Who this is not for:
Brands entering Korea with no local operations partner, who need that first and cannot substitute me for it. Sellers whose price is fixed by a Korean distributor. Accounts at low monthly spend, where a competent local freelancer is a better deal than this retainer and I will say so.
What arrives each week:
One sheet by item: spend, ad-attributed orders against total orders, Item Winner status and how it moved, days of stock cover, and the list of items I have paused with the reason next to each. A call every two weeks, in English, timed for Seoul and Bengaluru.