Eric Ries talks about three engines that drive company growth: the sticky engine, the viral engine, and the paid engine. But he cautions that while all successful companies will ultimately use all three engines, it’s better to focus on one engine at a time. For example, you might make your product sticky for its core users, then use that to grow virally, and then use the user base to grow revenue. That’s focus. In the world of analytics and data, this means picking a single metric that’s incredibly important for the step you’re currently working through in your startup. We call this the One
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