A/B-Testing MasteryFree course with certificate
After this course you run valid A/B tests and read results critically instead of blindly.
- 8 lessons
- 215 min
- 0 €
No credit card, no subscription.
- Run valid tests
- Assess test readiness
- Prevent dark patterns
What you will be able to do after this course
- Tell a real A/B test apart from a simple before-after comparison
- Read results critically using uplift and confidence intervals
- Estimate test duration and sample size from baseline, MDE and traffic
- Handle each of the four test end states correctly
- Check your shop for test readiness with the 21-point audit
- Avoid dark patterns such as confirmshaming that cost revenue
Who this course is for
For you if
- You work with an online shop or its marketing and want measurable results.
- You want to work on conversion systematically instead of copying individual tactics.
Not for you if
- You are looking for a how-to for a single tool.
8 lessons, 215 minutes
Every lesson has its real duration and ends with a quiz.Understanding Significance
Test Duration & Traffic
Winner, Loser, No Result
The A/B Testing Audit
A/B Testing: How It Works Under the Hood
A/B Testing Tools: An Overview
Ethical CRO & Avoiding Dark Patterns
After all quizzes and the final exam you receive the certificate as a PDF.
Jörg Dennis Krüger

Founder, JDKRUEGER&CO · Der Conversion Hacker®
Jörg Dennis Krüger has been optimising online shops for revenue since 2006. This course contains the approach his team tests and measures with for clients every day.
- EUR 210m+Additional revenue for clients since 2012
- since 2006in conversion optimisation
- Stevie® Goldmultiple award winner
Understand, measure, and scale. No statistics degree required
Was der Kurs behandelt
You will learn what A/B testing really is, when a result is valid, how long tests need to run, and how to assess your shop's test readiness.
Frequently asked questions
What does the course cost?
Nothing. Course, quizzes and certificate are free.
How long does the course take?
8 lessons totalling 215 minutes. You learn at your own pace and resume where you left off.
Do I need prior knowledge?
Basic online-marketing knowledge is enough.
How do I get the certificate?
Every lesson ends with a quiz. Pass all quizzes and the final exam to receive the "A/B Testing Mastery" certificate as a PDF.
Who is behind the Academy?
Jörg Dennis Krüger and JDKRUEGER&CO. The Academy contains the approach the team has used to optimise online shops for years.
Does the course apply to my shop system?
The principles apply to any shop system. You work with page types and metrics every shop has.
Lesson 1 takes 30 minutes.
Afterwards you know when a test result holds up.
