Glossary
A machine-readable map of product-minded tech concepts.
Definitions, examples, and practice links for the vocabulary behind product sense, systems, data, SQL, coding, and AI-era interviews.
Browse glossary terms
Product sense
Product sense is the ability to identify user needs, define success, reason through trade-offs, and recommend what a product should do next.
North star metric
A north star metric is the primary measure that reflects the recurring value a product creates for users and the business.
Retention cohort
A retention cohort groups users by when they started and measures how many return or remain active over time.
Event taxonomy
An event taxonomy is the agreed structure for naming product events, properties, actors, and contexts in analytics data.
API contract
An API contract defines request and response shapes, behavior, errors, versioning, and expectations between systems.
Trade-off
A trade-off is a decision where improving one important quality makes another important quality worse.
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