This project is to develop a mobile app for android and iOS platforms, it is a simple app that is going to consist of 5-6 pages which are
Loading screen, Home menu(with menu), locations, offers, and contact us.
I need to be able to send push notifications, I just want a little explanation on how this works, are the notifications able to be received while the app is not running? how notifications works?, my point is, I'd like to send 2-3 offers per month so the people that have the app installed can see them, I just want to know if is possible for the notification to be received even if the app is not running, if not what other options do I have?
I'll send the whole graphic design of the app