Positioning
Smallest Viable Audience
Name the fewest people you can serve so well they would miss you, then build for exactly them. A constraint, not a growth hack.
when you choose your smallest viable audience what language they speak how much money they have what problem they're trying to solve what their technical facility is whether they're short-tempered whether they're kind whether they're going to stick with you you have chosen everything that's going to go into the product