A push notification is, in mobile marketing context, a short text message sent to a smartphone and tied to an installed app.
Push notifications are used to update sport scores, news or promotions.
Push notifications make a sound and are displayed in various ways according to smartphone models. Sometimes the number of received notifications is displayed on the app icon. Push notifications are intrusive and have to be managed carefully to prevent notification fatigue the user can control push notifications and prevent an app to send them..
The terme push is used because the user doesn’t need to use or launch the app to receive notifications. He will get them even if he is using another app.