Why Ozon's ad analytics falls short
Paid advertising on Ozon comes in many formats: cost per click, cost per order, and several auto-strategy variants. On one small test store alone we spent $2,050 on promotion in two weeks, running 43 click-based campaigns at the same time. That is not a large budget by marketplace standards, but the store has enough products and campaigns to make the reporting messy.
The problem is not the spend, it is the reporting. Each campaign has its own target and actual ad cost share (ACOS), the same product appears in several campaigns, and once you launch many formats you start losing track of what is actually working.
Ozon does provide ad analytics. You can set a period, pick a product and switch the view to products to see metrics per item. For one cutlery tray, for example: 7,000 impressions, 59 clicks, 140 orders, 22 units sold, $985 in revenue and an ad cost share of 11%.
But after years of working with Ozon we learned that looking only at the ad cost share inside the promotion tool is misleading. Paid ads on Ozon always create a boost: positions in organic search rise, organic traffic converts better, and sales come in faster. Turn the ads off and organic performance drops.
Moving from ad ACOS to total ACOS
That is why we stopped measuring ACOS inside the promotion tool and switched to total ACOS: ad spend divided by the total revenue of the product, paid and organic together.
Here is the catch. Ozon does not show total ACOS per product, even though it holds all the data. Revenue per product for a chosen period is available in the analytics section, and ad spend is available too. The metric itself is simply not calculated.
So we used to build it by hand: pull the numbers, assemble the tables, recalculate everything. It took hours of our time and our account managers' time, and it was the most tedious part of the job.
Redemption ACOS: the more accurate calculation
Total ACOS is a big step up, but there is a further step: calculating ACOS from actual redemptions rather than from turnover.
Revenue is not the same as money received. Between an order and a payout there are returns and cancellations. Ad spend should be measured against redeemed orders, not against gross turnover, otherwise the efficiency of a product looks better than it really is.
With redemption ACOS you can make real management decisions. Take a 5-litre container with a 14% margin: you go into unit economics and see the actual numbers instead of an ad ACOS reported by the platform or a total ACOS that is not reported at all.
Total ACOS is already good, and sellers who calculate it are ahead of the game. Redemption ACOS is a different level of precision. With current marketplace commissions and thin margins, every percentage point you calculate correctly or incorrectly is the difference between earning, breaking even and losing money.
What a proper reporting system should do
We built our own analytics system to close this gap. It calculates total ACOS and redemption ACOS for every SKU, using the same dates and periods as the marketplace reports, so the numbers can be compared directly. On the same store and period, ad spend in the system came out at $2,006 against $2,050 in the marketplace, a small difference caused by data that had not refreshed yet.
Beyond reporting, the goal is recommendations: what to change in advertising, stock, product cards and returns. Our own stores are already connected and the system is suggesting specific actions and fixes.
Takeaway
Ozon's built-in ad analytics shows you campaign-level ACOS but not the metric that answers whether a product is worth promoting. Calculate total ACOS to account for the organic boost that ads create, and redemption ACOS to account for returns and cancellations. Only then does the ad spend line up with the money you actually keep.
