Whenever I sit down with a startup in hyper-growth, I see DIY metrics dashboards. Lots of different views, often set as the founder's homepage. I've noticed these data-driven growth hackers use the data to hightlight questions, rather than answer them. The collect the data, then inpect the behaviour.

Why are those users abandoning there? How come this marketing campaign got more upsellable customers? When did people stop using this feature so much?

Rather than assume your interpretation of the data is right, answer the questions your data's asking.

Collect, then inspect.