A twelve-hour live window. 3,810 orders. A 9.16% conversion rate. From near-zero traffic before 7pm.
Before assuming this was a huge campaign or an extreme discount, it was neither.
It began the previous month. Thousands tried to buy and the product was out of stock. In most stores that moment simply passes: people arrive, see "sold out," and leave, and the demand dies quietly.
Here the opposite happened. Back-in-stock alerts were enabled on the site, so anyone who tried to order and couldn't was added to a waiting list automatically. The moment the SKU returned to the warehouse, an automated email and SMS went out, carrying urgency that was real rather than manufactured, because the person had genuinely been waiting.
Then the circle widened. An email blast to everyone who had purchased before, an SMS blast to active buyers and high-intent segments, and segmentation by last visit, last purchase attempt and cart value, so every customer felt the message was for them rather than a mass send.
Ads came last, not first. One-day-click retargeting across everyone who had added to cart, viewed a product, initiated checkout or engaged with the brand without buying, with budget boosted only on high-intent segments. Ads closed the final 20 to 25% of buyers.
The order was: people who asked for the product and couldn't get it, then previous buyers, then people who came close to buying, and only then advertising.
Demand lost because stock ran out is the most valuable data in your store. If you aren't recording it, you're paying a second time to buy back people who already wanted to buy from you.
The lesson
Don't let existing demand die
