This document discusses how ecommerce stores can use customer data and segmentation to optimize their stores for better results. It recommends tracking key customer metrics like order value, lifetime value, top spenders, etc. to identify valuable segments. Stores should treat different customer segments differently, like providing targeted content, promotions or messaging to big spenders, frequent buyers or those abandoning carts. Tools like Glew.io, WP Fusion and ConvertKit can help automatically segment customers and trigger personalized experiences based on tags applied to customer profiles. Focusing efforts on the top 5% of high value segments can significantly boost revenue.