- Product managers at startups need to wear sneakers because they must actively search for customers outside the building, unlike at large companies where customers are known.
- Startups go through phases of customer discovery, validation, and creation where hypotheses about customers and products are tested iteratively through contact with potential users.
- There are three types of markets that determine how startups should approach sales, marketing, and business development - existing, resegmented, and new markets.
- Engineering approaches also differ between startups searching for problems/solutions and large companies executing known requirements. Founders must lead the search while product management can help or hinder it.