The shared module contains classes and resources which are used in more than one dynamically loaded module. By always loading with the application the shared components are ready whenever a module requests them.
The shared module is a good place to import and export the FormsModule and the ReactiveFormsModule. It is also good for the FontAwesomeModule and any other resource used by some modules some of the time but not all modules all of the time.
Note
This module is recommended for a path alias to @shared
ng generate module Shared