The test is simple. Name a decision that would change if the number halved. Cumulative counts almost never pass it, because they cannot go down.
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- A/B testingShowing two variants to comparable groups and measuring which performs better, on the same event data the rest of your analytics uses.
- AARRR frameworkAcquisition, Activation, Retention, Referral, Revenue: five stages used to decide which metric a team should be arguing about this quarter.
- ActivationThe moment a new user first gets the value the product promised. Everything before it is setup; everything after it is retention.
- Activation rateThe share of new users who reach that moment. The single number most onboarding work is trying to move.
- AttributionAssigning an install or a conversion to the campaign, channel or referrer that produced it.
- Average Revenue Per User (ARPU)Revenue in a period divided by active users in that period. Useful next to retention; misleading on its own.