What is a push service?

Push notifications look like SMS text messages and mobile alerts, but they only reach users who have installed your app. All the mobile platforms – iOS, Android, Fire OS, Windows and BlackBerry – have their own services for supporting push

For app publishers, push notifications are a way to speak directly to the user. They don’t get caught in spam filters or forgotten in an inbox: as a result, push click-through rates can be twice as high as email. They can remind users to use an app, even if it isn’t open. And they can drive such actions as: Promoting products or offers to increase sales Improving customer experience Converting unknown app users to known customers Sending transactional receipts right away Driving users to other marketing channels, such as social networks