How can we run the background services even if the app is closed/killed by user

OK, if i’m using FMC native plugin and add listener’s then how does the server come to know about those listener’s who are registered. So even if app is not running FMC native plugin can get the notification sent from the server end???

Can you explain a little bit on registering the listeners and how can I achieve the interaction from server to the app.

Thanks.