AirOps CMO • 6y
I answered this in this answer around soft and hard skills but if I were to pick my top, universally important skills for a PMM they would be:
Messaging and positioning
Cross-functional excellence
Understanding of data
Market, customer and competitor knowledge
Process management
From there, it really depends on your specific role and where you want to specialize. The skills each PMM has really depends on what's needed for them in their role.