Every time you scaffold a new project with Angular CLI ng new command, the CLI, by default, produces an Angular CLI workspace for that project. 

In some cases when you are working on multiple Angular projects under the same solution you may want to try out a Multi-project Workspace. This approach is also suitable for many enterprise projects.

ng new my-solution --create-application false
cd my-solution

ng g application my-app

ng g library my-shared-library

Links
Multi-project workspace

Angular Getting Started Workshop
ngstart.dev

Aliaksei's mailing list
kuncevic.dev