So another important element of long-term retention is figuring out how to move your users along a learning curve. This developmental process—called ongoing onboarding—is similar to how you would learn any subject, such as an instrument or language or technical skill: by starting with small, simple objectives and then building on your mastery incre... See more
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“Plot the % active users over time (for various cohorts) to create a retention curve. If it flattens off at some point, you have probably found product/market fit for some market or audience.
— Brian Balfour
Lenny's Newsletter • How to know if you've got product-market fit

a boost in retention: increases new user acquisition, improves monetization, strengthens acquisition muscle so you can push competitors out of channels and explore new channels, accelerates payback period so you can reinvest in acquisition sooner