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This document discusses user experience and growth hacking metrics for evaluating digital products and services. It introduces the AARRR framework for measuring Acquisition, Activation, Retention, Referral, and Revenue. The document recommends using A/B testing to evaluate different experiences and optimize for key metrics like conversion rates and engagement over time, with an example of testing that improved conversion rates from 9.12% to 68.7% in November 2015.Read less