Conversion Rate Optimisation: Where Your Funnel Is Leaking and How to Fix It

Conversion rate optimisation is the systematic practice of removing friction between a visitor arriving on your site and taking the action you want them to take. This page sets out the four places funnels actually leak and how SugarNova closes each one. To see how SugarNova runs conversion work and what it costs, visit the SugarNova CRO agency service.

Why are most conversion problems not where you think they are?

Most conversion problems sit downstream of the page brands actually optimise, because budget concentrates on acquisition and attention rarely reaches what happens after arrival. Conversion work compounds in a way acquisition spend does not: every improvement to the funnel makes every future pound spent on traffic more valuable, permanently.

The arithmetic is the proof. Lifting conversion from 2.0% to 2.4% delivers the same number of additional orders as increasing traffic by 20%, on the same spend, and the conversion gain does not stop the month the budget does.

Where do conversions actually leak?

Conversion leakage concentrates in four places on the funnels SugarNova audits. Each one is diagnosable before any test is built, which is why diagnosis comes before experimentation.

1. Landing page alignment. Traffic arriving from an ad or organic result finds a page with inconsistent messaging or an unclear next step, so the promise that earned the click is not kept.
2. Social proof distribution. Testimonials, case studies and results sit at the bottom of pages, where the buyers who need reassurance never reach them.
3. Mobile experience. Sites converting well on desktop and poorly on mobile lose the majority of their traffic to a friction-heavy mobile journey. Mobile is diagnosed and tested separately, never as a responsive afterthought.
4. Checkout or booking flow. Unnecessary steps, unclear value propositions and trust signals missing at the exact moment of conversion.

What is the SugarNova CRO methodology?

SugarNova begins every engagement with a quantitative audit rather than a proposal: session recordings, heatmaps, funnel drop-off analysis and device-split conversion data. That audit locates the leaks and sizes each one in pounds. Only then does a prioritised testing roadmap get built, grounded in the data rather than in best practice.

Tests then run to a significance threshold and a sample size agreed before launch, so the measured improvement is real rather than noise. A 4% improvement on a step 40% of buyers pass through beats a 30% improvement on a step almost nobody reaches, which is why the roadmap is ranked by revenue at stake and not by ease of fix.

How does CRO fit the integrated model?

Conversion work is most powerful inside an integrated growth system, because insights from the funnel are reusable upstream. At SugarNova, findings from the funnel feed directly into paid acquisition creative, SEO content strategy and GEO entity positioning. A message that converts on a landing page is a message that belongs in the ads, the content and the AI search citations.

To have this run for you, see the SugarNova CRO agency service, or read how conversion gains compound into enterprise value and a higher exit multiple.

Book your Free Growth Audit at book.sugarnova.com/audit to find out where your funnel is leaking and what closing it is worth.

About the author

Shayne Williams is Founder and Group CEO of SugarNova Group, the UK growth group he founded in London in 2016. Shayne has run integrated PR, SEO, GEO, paid media and CRO programmes for DTC eCommerce and high-ticket lead generation brands, and originated the Exit-Led Growth category.

Last substantively updated: 1 September 2026.