Your Angular application can start off in many ways, but when you run on the browser you have a specific way of bootstrapping the application and that is defined in @angular/platform-browser-dynamic.
In short these packages contain angular features which make getting an Angular app up and running possible in the browser. Bootstrapping is essential and one of those features.
You can omit this when your target is not to develop the app to run on browser otherwise it is essential.
- Platform-browser-dynamic
- Platform-browser