In this episode, I sit down with Joe Johnston, Head of Conversion Optimisation & Experimentation at Launch, a UK-based performance marketing agency, to explore what really drives results in digital marketing.
We move beyond “spray and pray” tactics and into the discipline of experimentation: forming hypotheses, A/B testing, and building a long-term CRO program that improves performance across the full customer journey.
Joe shares real world insights from working across paid media, websites, and full-funnel performance marketing, including:
- What conversion rate optimization (CRO) actually means in practice
- Why experimentation is not a one-off project
- Common CRO mistakes that even large brands still make
- How headlines, value propositions, and CTAs impact conversions
- Using AI for customer research, review mining, and idea generation
- The future of agencies: strategic “think-for-you” vs executional “do-for-you” work
We also discuss careers in marketing, why early generalist experience matters, and how students and early career marketers can think about experimentation as a long term skillset.
Note: this was the first episode filmed, so the video is a little rough around the edges; but there’s real substance and insight in what Joe shares.
If you’re interested in CRO, experimentation, performance marketing, digital strategy, or applied behavioral science, this episode is for you.
Guest: Joe Johnston, Head of Conversion Optimisation & Experimentation at Launch
Learn more about Launch: launchonline.co.uk
Connect with Joe on LinkedIn: https://www.linkedin.com/in/joe-johnston-838bb428/
00:00 Introduction to Conversion Optimization
09:47 The Journey of a Conversion Specialist
13:49 Insights on Human Behavior
15:56 Successful Projects and Their Impact
21:26 Common Mistakes in Conversion Optimization
25:03 The Process of Conversion Optimization
26:53 The Power of Research in Conversion Optimization
28:53 Psychological Principles in Marketing
33:20 Tools for Conversion Rate Optimization
37:42 AI's Role in Idea Generation
41:33 The Agency's Evolving Role in a Tech-Driven World
43:42 Common Mistakes and Best Practices in CRO
46:58 Career Advice for Aspiring Marketers