Stop 09 · Growth & ExperimentationTopics · 2/10
A/B Testing Fundamentals
Part of the Product Management Roadmap
In short
Randomly splitting users into a control and variant group to measure a change's real causal impact — the gold standard for validating that a feature actually improved the metric you care about.
How to learn this
- 1Design an A/B test for a real feature idea, including control and variant.
- 2Learn the difference between correlation and causation, and why A/B tests solve for the latter.
- 3Understand common pitfalls: novelty effects, seasonality, and running tests too briefly.
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