There is no single trick to increasing eCommerce sales. Revenue comes from four levers, and the fastest growth usually comes from fixing the ones you have been neglecting rather than pouring more money into the one you already know. Most stores default to buying more traffic, when the quicker wins are often sitting in conversion and retention, closer to the money.
This guide breaks growth into those four levers, shows the highest-return moves under each, and gives you a sensible order to work in.
| The short answerOnline sales come down to four levers: more of the right traffic, a higher conversion rate, a bigger average order value, and more repeat purchases. Multiply them together and small gains in each compound into big results. Most stores over-invest in traffic and under-invest in conversion and retention, which is usually where the quickest wins sit. |
The four levers of eCommerce sales
It helps to see revenue as a simple sum. Roughly, your sales are your traffic, multiplied by the share of visitors who buy, multiplied by how much they spend, multiplied by how often they come back: traffic x conversion rate x average order value x purchase frequency.
The important thing about a formula like this is that the levers multiply, they do not add. A 10% improvement in each of the four is not a 40% gain, it compounds to more than 45%. That is why spreading your effort across all four beats obsessing over one, and why the store that quietly improves conversion, order value and retention often grows faster than the one simply spending more on ads.
1. Get more of the right traffic, not just more traffic
Traffic is the lever everyone reaches for first, but volume alone is a trap. Cold, poorly targeted traffic converts far worse than branded, organic or returning visitors, so more of the wrong traffic can actually lower your conversion rate and flatter no one. Focus on quality and intent:
- Organic search. Well-optimised category and product pages capture people who are actively looking to buy, at no cost per click. It is slower to build but compounds. Our eCommerce SEO work is built around exactly this.
- Paid search and shopping. Google Ads and Shopping put you in front of high-intent buyers immediately, and are the fastest way to test demand and scale what works.
- Email and owned audiences. The cheapest traffic you have is the audience who already know you. Growing and using your list reduces your reliance on paid.
- Social and content. Useful for awareness and demand, but treat it as top of funnel and expect it to convert lower than search.
The goal is a healthy mix, weighted towards intent, not a single channel you are dependent on.
2. Convert more of the visitors you already have
This is usually the cheapest lever, because you have already paid to get the visitor to the site. And the scale of the opportunity is enormous: the average cart abandonment rate in 2026 is around 70%, rising to roughly 80% on mobile. In other words, more than seven in ten people who add something to their basket leave without buying, and most of those exits are fixable.
The reasons people abandon are well documented and consistent. Unexpected extra costs are the single biggest cause, cited by nearly half of shoppers, followed by being forced to create an account, a checkout that is too long or complicated, not being able to see the total cost upfront, weak trust signals, and poor delivery or returns terms. Work through the obvious fixes:
- Show shipping, taxes and the full total early, so there are no surprises at the final step.
- Offer guest checkout and never force account creation before purchase.
- Add express payment options such as Apple Pay, Google Pay and Shop Pay, which remove most of the friction on mobile.
- Cut the number of checkout steps and fields to the minimum.
- Put trust signals close to the buy button: reviews, ratings, clear returns and secure payment.
- Fix site speed, especially on mobile, because every extra second costs sales.
Even a small lift here pays back fast. If you want the benchmarks and how to measure your own, our guide to what a good eCommerce conversion rate is covers it in detail.
3. Increase your average order value
Getting each customer to spend a little more is one of the most profitable moves available, because the extra revenue drops almost straight to the bottom line. You have already covered the cost of acquiring and converting the customer, so the margin on the additional spend is high. The reliable tactics:
- Free-shipping thresholds. Set the bar just above your average order value and prompt shoppers with how much more they need to spend to qualify.
- Bundles and sets. Group complementary products at a small saving, which lifts basket size and simplifies the decision.
- Cross-sell and upsell. Suggest relevant add-ons on the product and cart pages, and a better version of what they are already viewing.
- Volume and tiered pricing. Reward buying more, particularly useful for consumables and B2B.
- Subscriptions. Turn a one-off purchase into a recurring one for anything people buy regularly.
4. Turn one-time buyers into repeat customers
Acquiring a new customer costs far more than selling again to an existing one, so retention is the quietest and most durable growth lever. A small increase in how often customers come back compounds over their lifetime into a large increase in revenue, and it makes every pound you spend on acquisition go further. The essentials:
- Lifecycle email and automation. Welcome, post-purchase, replenishment and win-back flows do the selling for you in the background. Tools like email marketing automation make this straightforward.
- Loyalty and rewards. Give repeat buyers a reason to choose you again rather than shopping around.
- Subscriptions and reordering. Make the second and third purchase effortless.
- Genuinely good post-purchase experience. Fast delivery, clear updates and easy returns turn first-time buyers into regulars.
Where to start
If you only have the capacity to work on one thing at a time, this is the order that pays back fastest for most stores:
- First, fix conversion and checkout. It is the cheapest win because you already have the traffic, and it lifts the return on everything else.
- Then raise average order value. High-margin, quick to implement, and it improves the maths on your ad spend.
- Then build retention. Set up the core email flows so repeat sales start compounding.
- Then scale traffic. Once the store converts and retains well, pouring more traffic in becomes an investment rather than a leak.
The mistake we see most often is spending heavily on traffic into a store that does not convert or retain. Fix the store first, then turn up the volume. If you would like a partner to do this with you, joining up the build, the marketing and the testing is exactly what our eCommerce growth partnerships are built for.
Frequently asked questions
What is the fastest way to increase online sales?
Improving conversion and checkout is usually the fastest, because you are working with traffic you already have. Removing surprise costs, offering guest checkout and express payment, and speeding up the mobile experience can lift sales within weeks, with no extra ad spend.
Should I focus on traffic or conversion first?
Conversion first, in almost every case. Sending more traffic to a store that converts poorly wastes money, because you pay for visitors who leave. Fix the conversion rate and average order value, then scaling traffic multiplies a store that already works.
How do I increase average order value?
Free-shipping thresholds set just above your current average order value, product bundles, relevant cross-sells and upsells, and subscriptions for regular purchases are the reliable levers. Because the customer is already buying, the extra revenue is high margin.
Does email really drive eCommerce sales?
Yes, consistently. Automated lifecycle flows such as welcome, abandoned cart, post-purchase and win-back recover sales that would otherwise be lost and bring customers back, usually at a far lower cost than paid acquisition.
Related reading: What is a good eCommerce conversion rate? and what is a good ROAS for eCommerce?
Want a growth plan across all four levers? Book a Growth Call and we will show you the quickest wins for your store.