Creating shared modules is essential for organizing reusable components, directives, and pipes that are used across multiple feature modules in Angular applications. As the creator of CoreUI, a widely used open-source UI library, I’ve architected shared module systems in countless Angular projects over 25 years of development. From my expertise, the most effective approach is using Angular CLI to generate a shared module and then importing/exporting common components. This promotes code reusability and maintains clean module architecture.