E-commerce Analytics: 8 Metrics Every Online Store Should Track

E-commerce Analytics: 8 Metrics Every Online Store Should Track

Shopify shows you data. The question is whether you are looking at the numbers that drive decisions or the numbers that just feel good. Total sales and total visitors are easy to find and often misleading: a store can have growing traffic and declining profitability simultaneously, and the summary dashboard will not tell you that. These eight metrics tell you what is actually happening in your business and what to do when they move.

Why Most E-commerce Owners Track the Wrong Numbers

The default Shopify dashboard shows total sales, average order value, conversion rate, top products, and traffic over time. These are useful, but they are missing the metrics that reveal where money is being left on the table: which products are margin-negative, which traffic sources produce buyers vs browsers, and how much revenue you are losing from cart abandonment.

Most store owners also track metrics without benchmarks. A 2.1 percent conversion rate means nothing in isolation. It means something when you know your category average is 3.2 percent, you were at 2.9 percent three months ago, and you changed your checkout flow last month.

Track these eight metrics, know your benchmarks for each, and review them monthly with comparative data from the prior period.

Metric 1: Conversion Rate

What it is. The percentage of website visitors who complete a purchase. Total orders divided by total sessions, expressed as a percentage.

Benchmark. Average e-commerce conversion rates range from 1.5 to 3.5 percent across industries. Luxury goods and high-consideration purchases convert at 0.5 to 1 percent. Consumables and low-cost impulse products convert at 3 to 5 percent.

What to do when it drops. Check whether the drop is site-wide or concentrated on specific pages. A drop on the product page usually indicates a product content issue (photos, descriptions, reviews). A drop at checkout usually indicates a friction issue (too many form fields, unexpected fees at checkout, limited payment options). Review session recordings on the affected pages.

What to do when it is below benchmark. Run Google PageSpeed Insights on your product pages and checkout. Core Web Vitals failures are a common but overlooked cause of below-average conversion rates, particularly on mobile. Test the checkout flow on an actual mobile device on a 4G connection.

Metric 2: Average Order Value (AOV)

What it is. Total revenue divided by total orders in a given period.

Benchmark. Varies widely by product category. The more relevant benchmark is your own historical AOV trend. A declining AOV typically means customers are buying smaller or cheaper items more frequently, or that your discount usage is increasing.

Tactics to increase AOV. Four tactics with consistent results:

• Free shipping threshold: set 20 to 30 percent above your current AOV. A store with an average order of $65 and a free shipping threshold at $85 will see meaningful AOV increases from customers adding a qualifying item. Test the threshold level.
• Product bundles: group complementary items at a slight discount to individual prices. Bundles at 5 to 15 percent discount from combined individual prices typically sell at 2 to 4 times the rate of the component products individually.
• Post-add-to-cart upsell: show a complementary product immediately after the customer clicks "Add to Cart" before they reach the cart page. Klavio, ReConvert, or Zipify OCU handle this on Shopify.
• Quantity breaks: offer per-unit discounts for larger quantities ("Buy 2, save 10%; Buy 4, save 20%"). Works best for consumable products with repeat purchase behaviour.

Metric 3: Cart Abandonment Rate

What it is. The percentage of shopping carts that are created but not completed as a purchase. Calculated as: 1 minus (completed purchases divided by carts initiated), expressed as a percentage.

Benchmark. Average cart abandonment rate across e-commerce is approximately 70 percent. This sounds alarming but is partially structural: many users add to cart as a wishlist function or to check shipping costs without intending to purchase immediately.

What matters most. The recovery rate, not the abandonment rate. A 3-email abandoned cart sequence (sent at 1 hour, 24 hours, and 72 hours after abandonment) typically recovers 3 to 7 percent of abandoned carts at zero additional acquisition cost. Klaviyo's built-in flow handles this automatically once configured.

Monitor whether your abandonment rate is increasing over time. A sudden increase often indicates a checkout friction issue (a payment method stopped working, an error message is appearing, or a coupon code field is failing).

Metric 4: Customer Acquisition Cost (CAC)

What it is. The total cost of acquiring a single paying customer. Total sales and marketing spend divided by total new customers acquired in the same period.

Include all costs: ad spend, agency fees, influencer payments, discount codes used by first-time buyers, and the portion of staff time spent on acquisition activities.

Why it matters. CAC sets the ceiling on your profitability per channel. If your CAC from Google Ads is $28 and your average gross margin is $35 per order from a first-time buyer, you are making $7 per customer from paid acquisition before accounting for overhead. If your repeat purchase rate is 35 percent, the calculation improves significantly over time.

Calculate CAC separately by acquisition channel. Google Ads CAC, Meta Ads CAC, and influencer CAC often differ by a factor of two to three. The channel with the lowest CAC relative to CLV is the one to scale.

Metric 5: Repeat Purchase Rate

What it is. The percentage of customers who have made more than one purchase from your store. Calculated as: customers who have purchased more than once divided by total customers, expressed as a percentage.

Benchmark. Industry average for most e-commerce categories is 25 to 30 percent. Fashion and apparel is typically at the low end (20 to 25 percent). Pet supplies and consumables are at the high end (35 to 45 percent).

Why it is your most important growth lever. Repeat buyers cost nothing additional to acquire, spend more per order than first-time buyers, and have a meaningfully higher referral rate. Improving repeat purchase rate from 20 to 30 percent can increase overall annual revenue by 15 to 25 percent without any increase in marketing spend.

Tactics to improve repeat purchase rate: a post-purchase email sequence (not just a shipping notification, but a sequence that delivers product usage value and relevant complementary products), a loyalty programme, a subscription option for consumable products, and personalised reorder reminders at the expected repurchase interval.

Metric 6: Gross Margin Per SKU

What it is. Revenue minus cost of goods sold (COGS) for each individual product, expressed as a percentage of revenue.

Most e-commerce businesses know their blended gross margin. Few track margin at the SKU level. The difference matters significantly in a business with many products.

Why it matters. A product that represents 25 percent of your revenue but has a 12 percent gross margin is less profitable than a product generating 10 percent of revenue at 42 percent margin. Traffic and advertising spend directed at low-margin products produces revenue but does not build a profitable business.

Track gross margin per SKU quarterly and use it to: (1) identify which products to promote vs deprioritise in ad campaigns, (2) identify which products are pricing below their market position, (3) identify products where COGS can be reduced through volume negotiation or supplier changes.

Metric 7: Return Rate

What it is. The percentage of items sold that are returned. Total units returned divided by total units sold in the same period.

Benchmark. Fashion and apparel: 20 to 40 percent return rate is normal. Electronics: 5 to 10 percent. Consumables and gifts: under 5 percent.

What high return rates indicate. Returns are customer feedback. High returns on a specific product usually indicate a size or expectation mismatch: the product does not look or work the way the photos and description implied. Audit the product content (photos, sizing guides, detailed descriptions) for your highest-return SKUs before assuming the product has a quality issue.

Metric 8: Revenue Per Visitor (RPV)

What it is. Total revenue divided by total website visitors in the same period. RPV = Conversion Rate x Average Order Value.

Why it is the single most useful composite metric. RPV captures the combined impact of both conversion rate and AOV in a single number. When you run a test, compare RPV between variants rather than conversion rate alone. A test that increases conversion rate by 0.5 percent but decreases AOV by $10 may actually produce a lower RPV.

How to improve RPV. Any initiative that improves conversion rate or AOV without negatively affecting the other metric improves RPV. Track RPV by traffic source to identify which sources send visitors who both convert and spend more.

Setting Up E-commerce Analytics in GA4

For Shopify stores, install the Google and YouTube app from the Shopify App Store and connect your GA4 property. This automatically enables enhanced e-commerce tracking: product views, add to carts, begin checkout, and purchases all flow into GA4 as standard e-commerce events.

In GA4, your e-commerce data appears under Reports > Monetisation > E-commerce purchases. Tag all external links (email, social, paid campaigns) with UTM parameters to ensure accurate source attribution in GA4.

For more on GA4 setup and configuration, read Google Analytics 4 Setup Guide for Small Business. For dashboard setup connecting these metrics into a live view, read how to build a business dashboard without a data team.

Our data analytics service covers e-commerce analytics setup, custom reporting, and monthly performance reviews for online stores at any scale. A data analyst can audit your current tracking setup and identify which metrics you are missing within a single day. Get in touch to discuss what your analytics should be telling you.