Know the character of every product you own: which ones pull people in, which ones sell on their own, and which only move when you pay for ads.
Under 20 SKUs, you can usually feel which products work. Past that, the signals scatter across marketplace dashboards, ads managers and order exports. Bring those reports together, so it's easier to understand every single product from one view.
Once you know each product's character, you know which ones must never run out, and plan production before they do.
Find the products that sell on their own, and let your campaign budget work harder on the ones that need it.
See which products customers choose without a push, and build your next collection around them.