Use

— Why do they want it? (e.g., "So I can buy them later when they go on sale") User Stories vs. Use Cases While they sound similar, they serve different purposes: Use Case VS User Story - e-Legion

— What do they want to do? (e.g., "I want to save items to a wishlist") — Why do they want it

— Who is the user? (e.g., "As a registered customer") "As a registered customer")