Tracking the Metrics That Matter for Online Shops

Why the Numbers That Impress Rarely Help

Open most e-commerce dashboards and you will be greeted with a wall of impressive-looking figures: sessions, page views, followers, email subscribers, total orders. They climb, they dip, and they rarely tell you what to do next. A spike in traffic feels like progress, until you realise the extra visitors browsed three products, added nothing to a basket and left.

Vanity metrics are not lies. They are just unhelpful. Knowing that 40,000 people visited last month does not tell you whether your product pages persuade, whether your delivery charges scare people off, or whether your ad spend is quietly losing money. Four numbers do. If you only track four things this quarter, make them these.

Conversion Rate: The One That Pays the Bills

Your conversion rate is the percentage of sessions that end in an order. For most independent UK shops selling physical goods, somewhere between 1% and 3% is normal, and 2.5% or above is genuinely good. Below 1% usually points to a fixable problem rather than a hopeless one.

Break it down rather than staring at the single figure:

• By device. Mobile conversion is often half the desktop rate because checkout forms are fiddly. Test your own checkout on a mid-range Android phone over a slow connection.
• By traffic source. Paid social usually converts worse than search or email. That is expected, but if the gap is enormous, your landing pages do not match the advert.
• By landing page. A product page at 0.4% while others sit at 3% needs rewriting, better photography or honest stock levels.

Then act. Add delivery costs and returns policy above the fold. Trim the checkout to the fewest possible fields. Show a basket total including VAT and postage before the final step, because surprises at the last stage are the most common cause of abandonment in the UK.

Average Order Value: Small Nudges, Real Money

Average order value (AOV) is total revenue divided by number of orders. A 10% lift in AOV costs you nothing in extra traffic, which makes it the cheapest growth you will find.

Practical moves that work for shops of almost any size:

• Set free delivery just above your current AOV. If your AOV is £48, a £60 threshold pushes baskets upward rather than simply giving away margin.
• Offer a two-for or three-for bundle on your best-selling line, priced so the bundle beats buying singles by a small, obvious margin.
• Place one relevant add-on on the basket page: a refill, a gift box, a spare part. One, not five.
• Watch AOV alongside conversion rate. If AOV rises 15% but conversion drops 20%, you have priced customers out, not upsold them.

Repeat Purchase Rate: The Quiet Profit Engine

Repeat purchase rate is the share of customers who order again within a set window, usually 12 months. Segment it honestly: a candle shop and a printer-ink shop cannot share a benchmark. Instead, compare each cohort against your own previous cohorts.

If your rate is flat or falling, look at what happens between orders. A simple three-email sequence — a delivery follow-up, a usage or care tip two weeks later, a replenishment reminder timed to how long the product actually lasts — often moves the number more than any discount. Loyalty schemes help, but only once the product experience is solid. Rewarding people for returning to a shop they already like is easy; bribing them to overlook a poor experience is not.

Customer Acquisition Cost: Know What a Customer Is Worth

Customer acquisition cost (CAC) is total marketing and advertising spend divided by new customers gained in the same period. Work it out monthly and include everything: ad spend, agency fees, affiliate commissions, samples sent to creators, the software you pay for to run campaigns.

The number only means something next to margin. If your gross margin per first order is £20 and your CAC is £26, you are buying customers at a loss and hoping they return. That can be a deliberate strategy, but only if your repeat rate genuinely covers the gap within a year. Set a rule and stick to it — for example, CAC must not exceed first-order gross profit plus a defined share of predicted second-order profit.

Also track blended CAC, which counts every new customer including those from free channels, alongside paid CAC by channel. That pair tells you whether paid activity is subsidising growth or cannibalising sales you would have made anyway.

Put Four Numbers on One Page

Build a single weekly view: conversion rate, average order value, repeat purchase rate and customer acquisition cost, each with a 12-week trend line and a target. Ignore daily swings; look for three consecutive weeks moving the same direction.

Add one line of commentary per number explaining what you changed and what happened. That habit turns reporting from a chore into a decision-making tool. Traffic will still fluctuate, followers will still look impressive, but you will be steering the shop on the figures that actually decide whether it thrives.