Know Who You Are Building For and Why

Teresa Torres argues that successful products, even giants like Facebook and Google, began by serving a narrow group rather than everyone. Founders who try to sell to everyone end up building for no one, because the product fails to deliver strong value to any particular audience. She explains the distinction between a customer segment (who you serve) and a value proposition (why your product delivers value), noting the product itself may stay the same while the value proposition shifts by segment. She recommends testing whether the value proposition resonates with the chosen segment through targeted messaging and measuring real action, not just interest. Finally, she argues this alignment matters for all product managers, not only founders, because it should shape features, copy, and success metrics continuously.

01Key takeaways

• Start with one specific customer segment rather than trying to serve everyone.
• Distinguish the product (what), the customer segment (who), and the value proposition (why).
• The same product may need different value propositions for different segments.
• Test value propositions with the right audience and measure action, not just stated interest.
• Make sure traffic reaches the intended segment, or results will mislead you.
• Keep value proposition and segment alignment in features, copy, and success metrics.

02Key sections

Big Companies Started Small

Facebook and Google did not launch to everyone; they grew step by step from narrow beginnings, which founders often overlook.

The Founder Mistake of Selling to Everyone

Trying to serve everyone results in a product that delivers little value to anyone, a common error among early founders.

Choosing a Specific Customer Segment

Pick one well-defined group of people who would benefit most, rather than a broad category like 'anyone who goes to the gym.'

Aligning Value Proposition with the Segment

The value proposition explains why the product delivers value to a segment, and it often changes across segments even when the product does not.

Testing and Why It Matters for PMs

Validate the value proposition with the right audience by measuring action, and keep this alignment in every product decision, not just strategy.

03From the post

“It’s easy to be fooled by the Facebooks and the Googles of the world. Everyone uses their products. They make it easy to rationalize why everyone will use your product. But when you draw this conclusion, you skip right from A to Z, ignoring all the steps they took”

04Frameworks mentioned

Summary and takeaways written by PM Atlas; quotes are short excerpts. © the original author.