Building a web app begins by outlining user roles, main use cases, and the data structure. A strong MVP emphasizes essential paths, intuitive navigation, and consistent UI elements, enabling rapid delivery without becoming a fragile collection of ad hoc screens.

Post-launch, scalability and dependability take priority: performance budgets, caching, robust authentication, and well-defined API contracts. With solid monitoring, CI/CD, and deliberate architecture, teams can iterate more quickly while preserving codebase stability as features and traffic expand.