Make the page easier to understand.
Organic cotton tee
Fit, fabric and care, described clearly.
Illustrative layout. A clear page is a starting point for testing, not evidence of a conversion lift.
01Show what the customer receives and how it fits the need.
Why CRO is the cheapest growth there is
Conversion rate optimization (CRO) is the work of getting more of your visitors to convert. What makes it unique is that the improvement hits all your traffic simultaneously: lift the conversion rate from 2% to 2.4%, and you get 20% more orders out of the same ad budget. Your effective CPA falls, your ROAS and POAS rise, and campaigns that were marginal before become profitable, without a single extra ad euro.
That's why we often call CRO the cheapest growth there is. Where more ad budget only lifts one channel, a better conversion rate lifts the entire business's economics. An hour of CRO work can move more than a week of bid adjustments.
From visit to purchase.
Change the inputs to see how numerator and denominator affect the result.
Find the leaks before you fix anything
CRO doesn't start by guessing at improvements — it starts by finding out where you're losing people. Break the funnel apart: visit → product view → add to cart → checkout started → purchase. A big drop-off between cart and checkout points to shipping, payment options or unexpected costs; drop-off before the cart points to the product page, price or relevance.
Use data to lead: analytics (where people fall off), heatmaps and session recordings (what they do on the page), and direct customer feedback (why they didn't buy). The goal is to find the few places where the leak is biggest. That's where an improvement moves the most.
The heaviest levers
Some levers almost always move something. Site speed is the most overlooked: every second of delay costs conversions, especially on mobile, where most of the traffic is. A frictionless checkout — fewer fields, guest checkout, the right payment methods (local wallets, card, Klarna), no surprises on shipping — removes the friction that stops ready-to-buy customers.
Trust and clarity carry the rest: clear USPs above the fold, social proof (reviews, user content) close to the buy button, accurate images, and answers to the objections that stop people (delivery, returns, sizing). On mobile, all of this has to work with the thumb. Mobile optimization isn't an add-on, but the starting point.
Test properly — or you'll fool yourself
The biggest CRO mistake is changing ten things at once and thinking you know what worked. Instead, test in a structured way: A/B-test one material change at a time, run it long enough for statistical credibility, and let the numbers — not your gut — decide. An "improvement" you haven't tested is a guess that could just as easily lower the conversion rate.
Prioritize your tests by expected impact and effort: start with the big leaks and the heavy levers, not with button colors. And remember that CRO isn't a project but an ongoing discipline — the best accounts test constantly and let the winners stand. Paired with profit-led advertising, CRO is the other half of how you get the most out of every visitor.
Frequently asked questions
What's a good conversion rate?
It varies with industry, price point and traffic source — many stores sit around 1-3%. But more important than the benchmark is whether your CVR is moving in the right direction, and where each step in the funnel loses people. Your own funnel says more than an average.
Where should I start with CRO?
Find the leaks first: break the funnel apart and see where the drop-off is biggest. Then attack the big leaks with the heavy levers — site speed, mobile optimization, a frictionless checkout and clear social proof — rather than fiddling with details like button colors.
Why should I A/B-test instead of just improving the page?
Because an untested "improvement" is a guess that could just as easily lower the conversion rate. A/B-test one material change at a time, run it to statistical credibility, and let the numbers decide what actually moved something.
From insight to action
See how it applies in practice.
The buying experience as part of marketing
Fotproffsen brings together advertising, email, profit measurement and conversion optimisation. Product-page previews in the case are illustrative design concepts.
Read the caseConversion and web
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About the author
Nicklas Segatz Mortensen
Growth hacker and fractional CMO with 10+ years' experience and hundreds of millions in managed ad spend behind him. Background from larger Danish and international scale-ups, and from the agency world.
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