Introduction Every YC batch, Michael Seibel gives a talk about building product. He'll ask: "How many of you are using Google Analytics as your primary source of metrics?" But it's a trick question. When the majority of the audience eventually raises their hands, he'll fake a sigh and tell everyone that they're doing it wrong, and that they should instead by relying on an event-based analytics tool.The linked video is from Startup School, but the same talk is given at YC Core as well. It's a perennial favorite, but don't let the humor distract you. Michael's got a good point. Without using an event-based analytics tool, which tracks the interactions your users have with your product, you won't know