Beauty brands on Shopify grow fast, then stall. A brand doing $80K a month suddenly plateaus at $400K, or worse, starts losing money while revenue keeps climbing. The founders who break through that ceiling aren't the ones with the biggest ad budgets. They're the ones who figured out how Shopify beauty brands use analytics to scale past six figures without guessing at what's actually driving profit. Here's what that looks like in practice: the metrics that matter, the tools that unify the data, and the mistakes that keep most beauty brands stuck.