Creating modules is essential for organizing Angular applications into logical feature groups, enabling lazy loading, and maintaining clean architecture in large-scale applications. As the creator of CoreUI, a widely used open-source UI library, I’ve organized countless Angular applications into feature modules for better maintainability, team collaboration, and performance optimization in enterprise projects. From my expertise, the most effective approach is to use Angular CLI’s ng generate module command with proper routing and feature organization. This method creates well-structured modules with proper imports, exports, and routing configuration for scalable application architecture.