Your SKU system is the unsexy foundation of your entire business. Get it wrong, and you’ll drown in inventory chaos; get it right, and scaling becomes effortless. We share the “General to Specific” naming hierarchy and the golden rule: uniform SKUs across every platform (Shopify, Amazon, TikTok). Learn the difference between SKUs, UPCs, and FNSKUs, and why you need separate SKUs for master cartons. We also emphasize factory-level scannability inspections—a $50 scanner at the source saves thousands in warehouse labor and prevents the nightmare of non-scannable inventory.