Link offline app with push notification and other feature

Hi everybody! I come back to develop with ionic, and i see a new feature for push notification and other stuff.
I create my application on my pc, and i create a reference online.
Now online i get an application ID. For link my offline and online app i copy the ID in my “ionic.project” file for “app_id” property. It’s enough for have my application correctly linked?
Or am i totally out of way?

Thanks for all reply!