how to put push notification in website

push notification is one of the most people engaging technique. which help the webpage having a regular visitors. Push notification allow the users to get the notification in front of their devices. An important advantage of push notifications in mobile computing is that the technology doesn't require specific
applications on a mobile device to be open in order for a message to be received. This allows a smartphone to receive and display  text message alerts even when the device's screen is locked and the social media application that is pushing the notification is closed.  

Different devices and services rely on different methods to deliver push notifications. Apple developers, for example, can use the Apple Push Notification Service's Developers application programming interface (API) to have their apps deliver push notifications to iOS devices. Another approach is to use mobile backend as a service cloud services to provide push notification functionality for a mobile app

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