What metrics should I track for e-commerce conversion optimization?

Track primary metrics: conversion rate, average order value, revenue per visitor, cart abandonment rate, checkout abandonment rate, and customer lifetime value. Also track funnel metrics: product page views, add-to-cart rate, checkout start rate, and completion rate. Engagement metrics include pages per session, time on site, and return visitor rate. Segment metrics by traffic source, device, and user type. Focus on metrics that directly relate to revenue. Avoid vanity metrics that look good but don't impact business. Good analytics setup enables tracking all these metrics. Many consultants help identify which metrics matter most for your business and set up proper tracking.