Traction Thinking from Day One
Traction thinking should shape the product itself, not just promote it. Knowing your likely channel changes what you build: a product meant to grow through virality needs sharing built into its core, one meant for SEO needs pages worth ranking, one meant for sales needs a price that supports a sales team.
The book also frames traction goals as the startup's compass. Define the next meaningful milestone (first 1,000 customers, default-alive revenue, whatever moves you to the next stage) and let it filter what you work on. Anything not moving you toward it is a distraction with good branding.
This is the quiet argument of the whole book: distribution is not a phase that comes after product. It's a parallel discipline that starts the same day, informs the same decisions, and deserves the same craft.
Key idea
Your likely channel should shape the product from the start, and a concrete traction goal should filter everything you spend time on.