Building a web app begins by outlining user roles, primary use cases, and the data structure. A robust MVP concentrates on essential pathways, intuitive navigation, and stable UI elements, enabling rapid delivery without becoming a brittle collection of ad-hoc screens.

Post-launch, scale and reliability take precedence: performance budgets, caching, secure authentication, and clean API agreements. With adequate monitoring, CI/CD, and well-considered architecture, teams can iterate more quickly while preserving the codebase's stability as features and traffic grow.