Every lesson, five minutes each.
Six tracks covering what a product person has to be good at. Read them in any order; the daily rotation picks for you if you would rather not choose.
6 lessons
Metrics
Choosing a North Star Metric
One number that represents delivered value, moves in weeks, and cannot be faked easily.
5 min read
Metrics
Leading and Lagging Indicators
Revenue tells you what happened. You need something that tells you what is about to.
5 min read
Metrics
Why Averages Hide the Story
A flat average often means two groups moving hard in opposite directions.
6 min read
Metrics
Reading a Retention Curve
The only question that matters is whether the curve flattens, and at what height.
6 min read
Metrics
Designing an A/B Test That Can Conclude
Decide the metric, the effect size and the duration before the test runs, or it will tell you nothing.
6 min read
Metrics
Goodhart's Law and Metric Gaming
Nobody has to cheat. A target quietly rewrites what everyone thinks the job is.
5 min read