A user story describes a piece of product value from the user's perspective: 'As a [user], I want [action] so that [outcome].' The format forces every feature to justify itself by who needs it and why.
Feature lists drift toward what's interesting to build. User stories anchor scope to outcomes, which makes cutting easier and honest.
At MVP stage, a dozen well-chosen stories beat a hundred-line backlog. If the MVP's stories don't all serve the same primary user, the scope is too wide.
Practical answers
Detailed enough that a designer or engineer knows when it's done — acceptance criteria handle the precision, the story holds the intent.
The founder or product owner drafts them; the team refines them together. Stories written solely by engineers tend to describe systems, not users.
Related pages
MVP Development
MVP development agency for founders: product scope, UX, engineering, and launch support from €7,000 — without overbuilding the first version.
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Acceptance criteria explained: how to write testable done-conditions for user stories, with examples and common failure modes.
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A practical definition of MVP scope for founders, including what to include, what to defer, and how to avoid overbuilding.
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A practical definition of a product roadmap for founders, including what it should include, how it differs from a backlog, and how to use one.
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