What are the critical skills required to succeed in Product Marketing at a senior level and what are the failproof way to learn them?

Communication is #1. This is what I look for in senior leaders regardless of focus area. If it's a core PMM, I want to see launch assets or customer-facing assets. If it's a GTM PMM, I want to see internal decks walking through how strategies were set up and sold to stakeholders.

Here's what I look for in communication:

-Is it concise?

-Is it clear?

-Is it compelling?

Details matter here. I look for people that intentionally choose every work and image. The failproof way to learn this is work on customer-facing content that gets a lot of views or internal content that goes to executive stakeholders. The key is to create content for the harshest critics, over & over again.