This document discusses metrics and analytics for startups. It begins by defining metrics and analytics, and explains why they are important for startups to test hypotheses and understand experimental results. It then discusses types of metrics like marketing, product, customer and pricing metrics. The document emphasizes the importance of focusing on one key metric that matters most for the business, like reducing shopping cart abandonment or improving subscription conversion rates. Finally, it notes metrics should be tailored to the specific business model, like e-commerce, SaaS, marketplaces or mobile apps.