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E-commerce CRO, conversion rate optimisation, is the practice of increasing the share of visitors who buy, using evidence rather than guesswork. It focuses on the pages where revenue is decided, the product page, cart and checkout, removes friction, strengthens proof, and tests changes to see what actually lifts sales. It grows revenue without needing more traffic.
Introduction
Buying more traffic is expensive. Converting more of the traffic you already have is often the faster, cheaper win. That is what CRO does, and for an online store the highest-impact places to work are predictable.
Start where revenue is decided
Most conversions are won or lost on a few pages: the product page, the cart and the checkout. CRO focuses effort there first, because a small improvement on a high-traffic decision point outweighs big changes on pages few people see.
Strengthen the product page
The product page is where most decisions happen. Strong imagery, clear and honest detail, visible reviews, obvious pricing and a prominent add-to-cart all reduce hesitation. Answering the buyer's real questions on the page removes the doubt that stops a purchase.
Remove checkout friction
Every unnecessary step, surprise cost or required account loses buyers at the final moment. A shorter, clearer checkout with expected payment options recovers sales that were nearly complete. This is often the single highest-return area in e-commerce CRO.
Use proof and reassurance
Doubt kills conversions. Reviews, ratings, clear shipping and return information and trust signals near the buy button all reassure the buyer at the point of decision. Reassurance placed where hesitation happens converts better than the same information hidden elsewhere.
Test, do not guess
CRO is evidence-based. Form a hypothesis, make one change, and measure whether it lifts conversions before moving on. Testing turns opinions into knowledge and protects you from changes that feel better but sell worse. Over time, a steady cycle of tests compounds into meaningful gains.
Measure the funnel
Look at where visitors drop between viewing a product, adding to cart and completing checkout. The biggest drop is usually the biggest opportunity. For the full store approach, see our guide on how to build a webshop that sells.