Lean analytics is focused on making data-driven decisions with limited data. It uses a cyclical process of choosing metrics, forming hypotheses, running experiments, and taking action. The key is focusing on the right metrics for the stage of the business and industry. For startups, the goal is to get feedback from customers and experiments to rapidly iterate towards product-market fit. Lean analytics helps prevent bias by surfacing learnings from customer interviews and experiments, rather than just relying on numerical metrics alone.