Key E-commerce Metrics Every Team Should Track
Master essential e-commerce metrics to optimize revenue, reduce acquisition costs, and improve customer lifetime value. Track conversion funnels, attribution, and retention to scale profitably.
Revenue & Profitability Metrics
Core metrics that directly measure your business's financial performance and unit economics. Focus here to understand your real profit drivers beyond gross revenue.
Average Order Value (AOV)
Your total revenue divided by number of orders. Increasing AOV by 10% often beats acquiring 10% more customers. Track in Google Analytics, Shopify Analytics, or Triple Whale.
Revenue Per Visitor (RPV)
Total revenue divided by unique visitors. This single metric reveals if your traffic quality is increasing or if conversion is declining despite higher traffic.
Gross Profit Margin
Revenue minus cost of goods sold (COGS), divided by revenue. E-commerce founders often ignore COGS; a 50% margin at 30% AOV growth means profit growth is higher.
Net Revenue Retention
Existing customer revenue growth (expansion + repeat) minus churn. Separates healthy retention from false growth driven by expensive new customer acquisition.
Price Elasticity
How order volume changes when you adjust price. E-commerce has high competition; small price increases often don't reduce sales, but testing is required.
Customer Acquisition Metrics
Measure the efficiency of your paid and organic customer acquisition. These metrics determine if your growth is sustainable and profitable.
Cost Per Acquisition (CPA)
Total marketing spend divided by new customers acquired. Your north star for paid channels. Calculate CPA per channel in Meta Ads Manager, Google Ads, and affiliate platforms.
Return on Ad Spend (ROAS)
Revenue from ads divided by ad spend. Track per campaign and channel in Meta, Google Ads, and Shopify Analytics. A 3x ROAS is standard for mature channels.
Customer Acquisition Cost by Channel
CPA broken down by traffic source: organic, paid social, email, search, affiliate, etc. Channels scale differently; what works at $1K spend may not work at $10K.
Blended CAC
Average CAC across all channels. Useful for board reporting, but hide behind channel-specific CAC when evaluating campaign performance.
Attribution Model Performance
Multi-touch attribution reveals which channels truly drive conversions. Last-click (default in GA) undervalues awareness channels like YouTube and podcasts.
Conversion & Cart Optimization
These metrics pinpoint friction in your customer journey. Improving any one of these compounds upstream revenue gains.
Conversion Rate
Visitors who complete a purchase. E-commerce average is 2-3%. Calculate in Google Analytics or Shopify Analytics. The highest-leverage metric to optimize.
Cart Abandonment Rate
Carts created but not purchased. E-commerce average is 70%. Recover via Klaviyo email sequences; even 5% recovery is high-margin revenue.
Add-to-Cart Rate
Visitors who add a product to cart. If this is low relative to page traffic, your product pages aren't compelling or price is unclear.
Checkout Conversion Rate
Carts that complete payment. Drop-off here is usually shipping cost, unexpected fees, or form friction. Monitor in Shopify Analytics or GA4.
Product Page Bounce Rate
Visitors who leave your product page without viewing details or adding to cart. High bounce means weak product photos, slow load, or unclear value prop.
Retention & Customer Lifetime Value
These metrics unlock profitable growth. High retention reduces CAC pressure and increases predictable revenue from your existing customer base.
Customer Lifetime Value (CLV)
Total profit a customer generates over their lifetime. Calculate: (AOV × repeat purchase rate × gross margin) / monthly churn. This justifies your CAC budget.
Repeat Purchase Rate
Percentage of customers who buy again. DTC average is 20-40%. Track in Shopify Analytics or Triple Whale. This directly multiplies CLV.
Customer Retention Rate / Churn
Percentage of customers who make another purchase within 12 months. Your biggest profit driver. A 5% improvement in retention compounds faster than CAC reduction.
Email / SMS Click-Through Rate (CTR)
Percentage of recipients clicking links in your retention emails or SMS. Tracked in Klaviyo. Average CTR is 1-3% for email, 5-15% for SMS.
Net Promoter Score (NPS)
Customer satisfaction metric: 'How likely are you to recommend us?' Scores 50+ indicate strong retention and word-of-mouth. Send post-purchase surveys.
Key Takeaway
Start by tracking Conversion Rate, Cart Abandonment, and CAC. Once these are optimized, focus on CLV metrics—retention is cheaper than acquisition. Use Shopify Analytics, Google Analytics, Klaviyo, and Triple Whale to build dashboards that surface these metrics daily.