Broadly, there are six categories of North Star Metrics: 1) Revenue (e.g. ARR, GMV) 2) Customer growth (e.g. paid users, marketshare) 3) Consumption growth (e.g. messages sent, nights booked) 4) Engagement growth (e.g. MAU, DAU) 5) Growth efficiency (e.g. LTV/CAC, margins) 6) User experience (e.g. NPS)