For a beauty brand on Shopify, ecommerce analytics delivers its highest value in seven specific use cases: subscription and repurchase rate monitoring, hero product velocity tracking, shade and variant performance analysis, influencer and TikTok-driven customer LTV measurement, sample-to-full-size conversion tracking, email list quality monitoring, and cross-category purchase path analysis. Beauty is one of the highest-repeat-purchase categories in ecommerce, with top brands seeing 40-60% of revenue from returning customers. The analytics infrastructure that serves this category well focuses less on one-time conversion optimization and more on retention economics, repurchase timing, and identifying which acquisition sources produce customers who actually keep coming back. This post covers exactly what those use cases look like and the decisions they enable.