A shade-level bestseller on Amazon can look like a dud on Shopify, and if your dashboard blends the two, you'll never notice. That's the core problem with most ecommerce analytics for a US beauty brand: they were built for apparel or CPG, not for a category where one SKU has 14 shades and returns run in the double digits. Beauty brands need a different kind of setup, and most of the popular tools weren't built with one in mind.