Definitions, examples, and practice links for the vocabulary behind product sense, systems, data, SQL, coding, and AI-era interviews.
Product sense is the ability to identify user needs, define success, reason through trade-offs, and recommend what a product should do next.
Open directoryA north star metric is the primary measure that reflects the recurring value a product creates for users and the business.
Open directoryA retention cohort groups users by when they started and measures how many return or remain active over time.
Open directoryAn event taxonomy is the agreed structure for naming product events, properties, actors, and contexts in analytics data.
Open directoryAn API contract defines request and response shapes, behavior, errors, versioning, and expectations between systems.
Open directoryA trade-off is a decision where improving one important quality makes another important quality worse.
Open directoryPublic previews show the map. The app gives you reps, Hatch follow-ups, FLOW feedback, weak-move drills, and saved proof of progress.