How to measure and improve the conversion rate through UX optimisation?
The average conversion rate for B2B websites is 2.23% and for e-commerce 1.84% according to WordStream 2023. Improving it requires: measuring the conversion funnel with Google Analytics 4, identifying drop-off points with heat maps (Hotjar), and applying systematic A/B tests. A well-executed UX optimisation can increase conversion by 20–73% according to industry benchmarks.
Key takeaways
- The average conversion rate of B2B landing pages is 2.23%; the median in e-commerce is 1.84% — WordStream 2023.
- The most actionable conversion metrics are: cart abandonment rate (global average 69.99% according to Baymard), time on page and scroll depth.
- Mobile-first design is critical: 58% of global web traffic comes from mobile (StatCounter 2024), but the mobile conversion rate is on average 3x lower than on desktop.
- UX KPIs for conversion include: task completion rate, Net Promoter Score (NPS) and Customer Effort Score (CES).
- The SaaS practical case documented in this article shows +58% in goal success rate through simplification of the pricing page and reduction of options (Hick's Law).
Most UX problems are not design problems. They are measurement problems. A site can look polished and still lose 70% of its visitors at checkout because no one checked where they were dropping off. The global cart abandonment rate sits at nearly 70% — not because users changed their minds, but because something in the flow created enough friction to stop them.
We have seen this pattern repeatedly: a business invests in visual redesigns whilst leaving form length, button placement and page speed untouched. The result is a more attractive site with the same conversion rate. Conversion-centred UX takes a different starting point. It measures first, changes second, and validates every hypothesis against real user data before treating anything as a permanent improvement.
This guide covers the methodology, the metrics that matter, and the specific levers that have the most consistent impact on conversion.
Fundamentals and Evolution of Conversion-Centred UX
| Traditional experience | Results-centred experience |
|---|---|
| Focused primarily on usability | Balances usability with business goals |
| Metrics: ease of use, satisfaction | Metrics: goal rates, value per user |
| Iterations based on qualitative feedback | Iterations based on performance data |
| User-centred process | User + goal funnel-centred process |
UX Optimisation Principles for Conversions
Clarity first
Clarity must always take priority over creativity. Users must immediately understand what your product or service offers, what benefits they will receive and what action is expected of them. A clear message reduces cognitive load and makes decision-making easier.
Strategic visual hierarchy
Visual hierarchy must guide the user through a logical journey: capturing attention with direct headings, developing interest with concrete benefits, building trust with verifiable social proof, and facilitating action with clear CTAs in a visible position.
Friction reduction and trust generation
Every additional step reduces the probability of success. The practical actions: simplify flows, eliminate unnecessary fields, offer multiple payment options. Transparency about costs, processes and policies reduces purchase anxiety more effectively than any persuasion element.
Essential KPIs for Measuring Conversions
| Metric | What it measures | Why it matters |
|---|---|---|
| Success rate | % of visitors who complete the desired action | Indicates the overall effectiveness of the project |
| Value per visitor | Revenue generated per visitor | Shows the real economic impact of the project |
| Abandonment rate | % of users who abandon the process | Identifies specific problems in the flow |
| Time to goal | Time from first visit to action | Reveals the efficiency of the decision process |
Optimisation Techniques and Case Study
Moving towards a results-centred approach means integrating data into the development process from day one: establishing clear KPIs before designing, implementing analytics tools at launch, and planning regular A/B test cycles with documented hypotheses.
Every visual element must have a measurable purpose: white space that directs attention, colours that reinforce hierarchy, images that communicate real value rather than generic decoration.
A SaaS company redesigned its pricing page following results-centred experience principles:
| Metric | Before | After | Change |
|---|---|---|---|
| Success rate | 2.4% | 3.8% | +58% |
| Revenue per visitor | $1.85 | $3.20 | +73% |
| Time on page | 1:45 | 2:20 | +33% |
Key changes included:
- Simplification of plan options (from 5 to 3)
- Incorporation of specific testimonials for each plan level
- Implementation of side-by-side comparison with feature highlighting
- CTA optimisation with benefit-oriented language
Conclusion
Results-centred experience is not about manipulating users into taking actions against their interests. On the contrary, it is about creating interfaces that align user goals with business goals. Run PageSpeed Insights on your ten highest-traffic pages right now. If any return an LCP above 2.5 seconds or a CLS above 0.1, you have a specific problem to solve. Tell us what you found and we will tell you where to start.
Sources and references
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WordStream: Conversion Rate Benchmarks 2023 (wordstream.com)
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Baymard Institute: Cart Abandonment Rate (baymard.com)
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StatCounter: Mobile vs Desktop 2024 (gs.statcounter.com)
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Nielsen Norman Group: Hick's Law in UX (nngroup.com)
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Google Analytics 4 - Conversion Tracking (support.google.com)
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Frequently Asked Questions
What is the average conversion rate in e-commerce in Spain?
According to data from IAB Spain and Statista 2023, the average e-commerce conversion rate in Spain is 1.4–2.1%, slightly below the European average (2.1–3.4%). Sectors with higher conversion: electronics (3.1%), fashion (1.9%), home (1.6%). Checkout optimisation is the single factor with the greatest impact on conversion rate.
What is Hick's Law and how is it applied in UX?
Hick's Law states that the time to make a decision increases logarithmically with the number of available options. In UX it is applied by reducing options on pricing pages (2–3 plans instead of 5–6), simplifying navigation menus, and using progressive disclosure to gradually reveal information. UX studies show that reducing options can increase conversions by 25–40%.
How to implement a CRO programme from scratch?
Phase 1 (Analytics): set up Google Analytics 4 with conversion goals and analysis funnels. Phase 2 (Research): install Hotjar for heat maps and recordings. Phase 3 (Hypotheses): prioritise changes with the PIE model (Potential, Importance, Ease). Phase 4 (Testing): implement A/B test with Google Optimize or VWO. Phase 5 (Iteration): monthly cycles of continuous improvement.
