Introduction

More visitors do not automatically mean more sales. Perhaps you know this: traffic to your website is increasing, but sales are falling short of expectations. This is precisely where Conversion Rate Optimisation (CRO) comes in.

CRO is the lever to get more customers, enquiries or sales from existing traffic without additional advertising costs. And the best part: even small improvements can have enormous effects on your turnover.

What is Conversion Rate Optimisation?

Conversion Rate Optimisation means increasing the percentage of visitors who perform a desired action. This action can be a purchase, a newsletter sign-up or filling out a contact form.

The goal: Generate more sales from existing traffic.

Formula: Traffic × Conversion Rate × Average Order Value = Turnover

A calculation example:

• 10,000 visitors per month

• 2% Conversion Rate

• £50 average shopping cart

= £10,000 turnover. If you increase the conversion rate to just 3%, turnover immediately jumps to £15,000 – and all without any additional marketing budget.

Why is CRO so important?

Many companies invest a lot of money in advertising to attract new visitors. But if the website does not convert, a large part of this budget is wasted.

CRO is the bridge between traffic and sales. At the same time, it takes into account the psychology of buying:

• Building trust (reviews, seals of approval, security)

• Providing guidance (clear CTAs, structured pages)

• Removing barriers (simple checkout processes)

How does Conversion Rate Optimisation work?

CRO is a systematic process:

1. Analysis of the customer journey: Where do users enter, where do they drop off?

2. Identifying weak points: e.g. high cart abandonment rates or unclear CTAs.

3. Developing and testing measures: Formulating hypotheses, conducting A/B tests, evaluating results.

4. Enjoying more sales.

Overview of CRO methods

• A/B testing and multivariate testing: With A/B testing, you compare two variants of a page or element, for example, button colour or headline. Multivariate tests test several elements at the same time. Example: Shop A tests two call-to-action buttons: "Buy Now" vs. "Add to Basket". Variant B achieves 12% more clicks.

• Usability optimisations: Good user-friendliness reduces abandoned purchases. The easier customers can find what they are looking for, the higher the conversion. Example: A furniture shop replaces a long checkout form with a 2-step process. Result: 18% fewer cart abandonments.

• Trust elements: Seals of approval, genuine reviews and clear information on shipping and returns increase credibility. Example: An electronics shop integrates Trusted Shops seals and displays reviews directly on the product page. The conversion increases measurably.

• Mobile optimisation: More than half of all online purchases are made on mobile. Example: A fashion shop optimises its product pages for thumb operation with large buttons and fast loading times. Result: 25% more mobile sales.

• Technical factors: Fast loading times and accessible design lower the bounce rate. Since 28 June 2025, the Accessibility Improvement Act also applies. Example: A retailer reduces image sizes and uses a CDN. The loading time drops from 4 to 1.5 seconds and conversion increases significantly.

• Funnel Alignment: All touchpoints should be aligned with each other, from the ad to the checkout. Example: A cosmetics shop aligns Facebook ads, landing pages and checkout pages with each other – same colours, tonality and offers. Result: more completed purchases.

Important key metrics in CRO

• Conversion Rate (CR): Core metric.

• Shopping cart abandonment rate: shows weaknesses in the checkout.

• Average Order Value (AOV): turnover per order.

• Customer Lifetime Value (CLV): value of a customer over the entire relationship.

• Bounce Rate & dwell time: provide insight into relevance and user experience.

• Return on Ad Spend (ROAS): how profitable paid advertising campaigns are.

Strategies to increase order value

• Cross-selling ("You might also like this"): You suggest matching items alongside the main product. Example: Smartphone in the cart → case or charger are suggested.

• Upselling (premium variants): Instead of "Basic subscription" → "Premium subscription". Psychological trigger: Customers want "the best" for their money.

• Bundle deals & quantity discounts: Example: "Skin-care set" instead of individual creams → higher shopping cart value.

• Minimum order values for free shipping: Example: AOV at £45, threshold for free shipping at £60 → customers deliberately add more purchases.

• Personalised product recommendations: Example: A regular customer for sportswear is specifically recommended matching shoes.

How much extra turnover does CRO really bring?

A small increase in the conversion rate has a disproportionate effect on sales. Example:

• Baseline: 2% CR, £100,000 turnover/month

• New CR: 2.5%

• Result: £125,000 turnover/month → +£25,000 without additional marketing

And every pound spent on marketing is now worth 25% more because more customers are buying.

Costs of Conversion Rate Optimisation

Conversion optimisation can be carried out internally or with an agency. This results in either ongoing costs for continuous tests or one-off project costs. It is important to consider the Return on Investment (ROI). Example: A measure costs £5,000, but permanently increases monthly turnover by £20,000.

Difference: CRO vs. shop optimisation

• CRO: Leverages turnover from existing traffic.

• Shop optimisation: Technical basis (design, performance, loading time).

→ Unbeatable together: Only with both components can sustainable growth be achieved.

Further success factors

• Understanding user psychology and behaviour

• Targeted use of colours, layouts and call-to-actions

• Using social proof (customer reviews, testimonials)

• Clarity and simplicity in the checkout

Content & storytelling as a CRO lever

These days, as a brand, you cannot do without content and storytelling; it is the be-all and end-all of online marketing. Most important of all are high-quality visuals (and videos) and convincing product descriptions that build trust.

Conclusion

It is highly important to create the foundations for a good conversion rate on your online shop. Conversion Rate Optimisation is a continuous process, not a one-off project. Anyone who regularly tests, optimises and improves details will benefit in the long term from:

• more turnover

• more efficient use of the marketing budget

• happier customers

💡 CTA for you: You can request an audit of your website from us, and we will look at how to make your shop even more effective.