Launching an online store can be exciting, stressful and distracting all at once.
With products, payments, delivery, hosting and customer service to think about, it is tempting to leave measurement until later. The trouble is that if you do not collect useful data from the start, you lose the chance to learn from your earliest visitors and customers.
You do not need to track everything. Tracking too much can make decision-making harder. Start with the numbers that help you understand whether the store is attracting the right people, converting them into customers and making enough profit to grow.
Conversion rate
Your conversion rate tells you what percentage of visitors complete a purchase.
The basic formula is:
orders / visitors x 100
If 1000 visitors come to your store and 25 place an order, your conversion rate is 2.5%.
Conversion rate is useful because it shows how effectively your site turns interest into revenue. If traffic is growing but sales are not, conversion rate can point you toward problems with product pages, pricing, delivery information, checkout, trust signals or site speed.
Average order value
Average order value shows how much customers typically spend per order.
The basic formula is:
revenue / number of orders
If your store takes GBP 5000 from 100 orders, your average order value is GBP 50.
This number helps with forecasting and promotions. If customers usually spend GBP 40, a free delivery threshold at GBP 50 may encourage them to add another item. If average order value is falling, you may need better bundles, clearer cross-sells or stronger product recommendations.
Basket abandonment
Basket abandonment happens when someone adds products to the basket but does not complete the order.
Some abandonment is normal. People compare prices, get distracted or decide to wait. But a high abandonment rate can suggest issues such as unexpected delivery costs, forced account creation, limited payment options, unclear returns information or a checkout that feels untrustworthy.
Review the checkout on desktop and mobile. A small improvement at this stage can have a meaningful impact on revenue.
Traffic by channel
Not all traffic is equal. Look at where visitors come from: organic search, paid ads, email, social media, referrals, marketplaces or direct visits.
Then compare each channel against revenue, conversion rate and average order value. A channel with lots of visitors but few sales may need better targeting. A smaller channel with a strong conversion rate may deserve more attention.
Customer acquisition cost
Customer acquisition cost tells you how much it costs to gain a customer.
If you spend GBP 500 on ads and gain 25 new customers, the acquisition cost is GBP 20 per customer.
This metric matters because sales are not automatically profitable. If your average order value is GBP 30 and your margin is slim, paying GBP 20 to acquire a customer may not work unless they come back and buy again.
Customer lifetime value
Customer lifetime value estimates how much revenue or profit a customer brings over time.
This is especially useful for stores with repeat purchases, subscriptions or consumable products. A first order might not be hugely profitable, but a returning customer can become very valuable.
If lifetime value is strong, you may be able to invest more confidently in email marketing, loyalty schemes and customer retention.
Returning customer rate
Returning customers are often cheaper to sell to than new customers.
Monitor how many customers come back, how often they order and what they buy next. If people rarely return, look at product quality, delivery experience, follow-up emails, packaging, support and whether you have a clear reason for customers to buy again.
Refunds, returns and support queries
Revenue tells only part of the story.
High return rates, frequent refund requests or repeated support questions can reveal problems with product descriptions, sizing information, images, delivery expectations or product quality.
These numbers are not just operational details. They tell you where the customer experience is falling short.
Site speed and technical health
For ecommerce, performance is commercial.
Slow pages can affect conversion rate, search visibility and customer trust. Keep an eye on mobile speed, checkout errors, downtime, broken pages and payment failures.
Your hosting, theme, plugins, image sizes and scripts all play a part. If the store is growing, make sure the hosting can keep up.
Keep the dashboard simple
Tools such as GA4, Search Console, ecommerce platform reports and payment provider dashboards can give you plenty of data. The aim is not to stare at every chart every day.
Choose a small set of numbers that reflect your goals, review them regularly and use them to make better decisions.
Good ecommerce measurement is not about vanity metrics. It is about understanding where customers come from, what helps them buy and what gets in their way.