What are the types of feature modules?

Below are the five categories of feature modules,

1. Domain: Deliver a user experience dedicated to a particular application domain(For example, place an order, registration etc)
2. Routed: These are domain feature modules whose top components are the targets of router navigation routes.
3. Routing: It provides routing configuration for another module.
4. Service: It provides utility services such as data access and messaging(For example, HttpClientModule)
5. Widget: It makes components, directives, and pipes available to external modules(For example, third-party libraries such as Material UI)