What is AB Testing and why is it needed in your marketing?

Introduction

In marketing, there is a fine line between a campaign that inspires action and one that misses the mark entirely. Every day, organisations make critical decisions about layout, copy, imagery, and timing based on gut instinct, but when your budget is on the line, you shouldn’t have to guess. 

This is where A/B testing comes in. Simply put, it means sending two different versions of a message to a small group of people to see which one performs best. While many people think this only works for digital marketing, the true power of A/B testing lies in its ability to improve every single message you send. Whether you are launching an email campaign, sending an SMS text, or mailing a premium physical welcome pack, letting real customer data guide your choices is the best way to ensure campaign success when it is fully launched. 

By embedding robust A/B testing methodologies across both online and offline channels, Romax helps organisations move beyond guesswork to discover exactly what resonates with their audience.

In this article, we will cover how A/B testing works for both print and digital campaigns, the specific elements you should be testing, and how Romax can support your A/B testing to ensure a successful campaign once launched. 

How does A/B testing work for both print and digital campaigns?

A/B testing is a definitive method to optimise performance by comparing two variants of a single marketing asset. To achieve accurate, reliable results, it is critical to isolate just one variable at a time, such as testing a single headline, or call-to-action, while keeping all other elements identical. 

Crucially, your target audience must be split evenly into two perfectly balanced groups that mirror the exact same demographics, geographic locations, and customer personas. By relying on clean, compliant data to ensure the only differentiator between Group A and Group B is the variable being tested, any uplift in response rates can be confidently tracked. Unlike digital campaigns, which are easier to track through open rates, click through rates or online enquiries, you need to build these into your printed A/B test campaign. This is typically done using unique promotional codes, custom links, or specific URLs assigned to each version. 

What are some of the elements you can A/B test?

When conducting A/B testing across both print (such as direct mail, brochures, and flyers) and online channels (like emails, landing pages, and digital ads), you can test parallel elements to see what truly resonates with your audience.

Here are the key elements you can A/B test across both mediums

• Messaging & Copy: For example: Test an email subject line or a printed letter headline.
• Call to Action: For example: Test the psychological impact of different action verbs in your call to action or test the method of action such as a URL versus a scannable QR Code. 
• Visuals & Design: For example: Test a product-focused photograph against an emotion-driven lifestyle image.
• Personalisation: For example: Test whether the campaign performs better coming from a specific person (e.g. “Robin from Romax”) or from the general brand identity (“The Romax Team”).
• Format: For example: Test a short, single-scroll landing page against a multi-step tabbed layout or postcard versus a sealed envelope letter. 

The most important thing is that you only test one variable at a time. If you test too many elements the results will be inconclusive.

Why is A/B testing important and how can Romax support your organisation? 

A/B testing is important because it replaces unknown guesses with facts. 

Here are some of the reasons why A/B testing is a critical practice for both print and digital campaigns:

1. Maximises Return on Investment (ROI): A/B testing allows you to discover which headlines, images, or offers yield the highest conversion rates. This gives you the insight on where to spend your marketing budget. 

2. Reduces Internal Conflict: A/B testing removes opinion from the equation and relies on customer behaviour.

3. Eliminates Risk: Large campaigns based on guesswork are highly risky. A/B testing allows you to run a pilot campaign to two smaller groups to determine the best direction for a full campaign execution. 

4. Provides Valuable Customer Insights: A/B testing provides a greater depth of insights and understanding for your target audience that can be invaluable for future campaigns and meeting overall business goals. 

At Romax, we take the guesswork out of your marketing by managing the entire A/B testing lifecycle from start to finish. Our team doesn’t just help you execute perfectly balanced multi-channel campaigns, we can dig deep into the resulting data, meticulously analysing response rates, QR code scans, and digital engagement. Romax can also help determine the best course of action for your follow-up campaign. 

By combining our data-driven insights with print and digital delivery, we ensure your optimised communications reach the right audience, maximising your ROI and driving measurable campaign success. 

Conclusion

Ultimately, A/B testing is not just a marketing tactic. It is a strategic necessity for organisations looking to achieve measurable results. By isolating variables, splitting audiences evenly, and relying on behavioural data rather than guesswork, you unlock the key to smarter, highly efficient customer communications. 

Whether you are aiming to increase digital engagement or maximise the tactile ROI of a direct mail campaign, Romax is here to help. 

Ready to eliminate the guesswork and elevate your next campaign? Contact the Romax team today.

hello@romax.co.uk
+44(0)20 8293 8550
www.romax.co.uk