Module 4 · 6–8 min
Net Revenue Retention — understand it, calculate it, challenge it.
A 6–8 minute professional shortcut: learn where NRR comes from, calculate it from customer movements, and understand what an investor will challenge.
INVEST01 · NRR workbook
The file fails if retention is kept without an independent source.
From the NRR workbook
Testers: press Start the lesson. Try and Check are inside the flow, not on this landing.
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