Top 10 metrics every scrum master must know

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What's your favorite metric out of this Top 10 list? 1. Velocity 2. CVC or Say:Do ratio 3. Burn up and Burn down chart 4. Feature burn up or Value delivered and RoI 5. Lead Time 6. Cycle Time 7. Defects 8. Customer satisfaction 9. Team satisfaction 10. Time to market