Essential ecommerce KPIs and metrics

Conversion rate is the percentage of visitors who complete a purchase. It’s the most cited ecommerce metric, but also one of the most misinterpreted. An overall CR without segmentation says little: what matters is analysing conversion by traffic source, device, product category and funnel stage.

The global average hovers around 2–3%, but varies enormously by industry: fashion ~1.5%, electronics ~2%, food & grocery ~4–5%. Rather than comparing yourself to generic benchmarks, your goal should be to improve your own CR period over period by identifying and removing friction.

AOV measures how much each customer spends per order on average. Increasing AOV is one of the most direct ways to grow revenue without needing more traffic or higher conversion.

The most effective tactics for increasing AOV include: free shipping thresholds (if AOV is €40, set free shipping at €50), product bundles, upselling on the product page, cross-selling in the cart and loyalty point programmes that incentivise larger purchases.

CLV estimates the total revenue a customer will generate over their entire relationship with your brand. It’s the most important long-term metric because it determines how much you can afford to invest in acquiring and retaining each customer.

A high CLV justifies bigger investments in acquisition, loyalty programmes and customer experience. Ecommerce stores with subscription models or frequently repurchased products typically have significantly higher CLVs than those relying on one-time purchases.

CAC measures how much it costs to acquire a new customer. It includes all marketing and sales spend divided by the number of new customers in a given period. It’s the counterpart of CLV: together they determine whether your business model is profitable.

A common mistake is calculating CAC without including all costs: not just ad spend, but also marketing tools, team costs, first-purchase discounts, onboarding costs and affiliate commissions. The real CAC is usually significantly higher than what appears in your Meta or Google Ads dashboard.

Cart abandonment rate measures the percentage of users who add products to the cart but don’t complete the purchase. The global average is approximately 70%, but it varies by industry, device and market.

Not all abandonment is bad: many users treat the cart as a wishlist or comparison tool. The problematic abandonment happens at checkout, where the user has shown clear purchase intent. Analysing which checkout step causes the drop-off is more useful than the overall rate.

Beyond the five core metrics, complementary indicators provide context and help detect problems or opportunities before they show up in the main KPIs.

A good ecommerce dashboard doesn’t show every possible metric: it shows the ones you need to make decisions. Organise it into three tiers: strategic metrics (CLV, CAC, revenue), operational metrics (CR, AOV, abandonment) and diagnostic metrics (by source, device, category).

Google Analytics 4 is the foundation, but complement it with specialised tools: Mixpanel or Amplitude for product analytics, Hotjar or Microsoft Clarity for heatmaps and session recordings, and Looker Studio or Metabase for consolidated dashboards that cross-reference analytics, CRM and financial data.