Is it possible to instantly deliver a web push notification to notify a phone call or to deliver any other time-sensitive notification?
deliverability
Web Push errors explained (with HTTP status codes)
When you send a web push notification to a browser push service, you may get an HTTP status code that represents an error.
Web Push Notifications: what happens if the client is offline?
If you are a beginner with web push notifications, you may wonder what happens to the notifications sent when the client is offline or the device is turned off. What is the behavior of the notifications in this case? Do they get delivered or are they lost?
Web Push TTL: definition and maximum value
When you send a web push notification, you need to set the TTL: what is it? What value should you use? This article describes the TTL and the best practices for setting its value.
Debugging web push notifications on a specific device
This article describes a simple and effective method for debugging web push notifications on a specific browser using Pushpad.
Web push notifications not shown / not delivered to browser
Why some web push notifications are not delivered to the browser? Why some notifications are not displayed to the user?
A notification that is successfully delivered to the browser push service, may not reach the end user for various reasons:
Web push subscription age affects delivery rates
This article investigates one of the reasons that negatively impact delivery rates for web push. First it shows that web push subscriptions can last many years without expiring, then it proves a negative correlation between the age of a web push subscription and its expected delivery rate.
Targeting only recently active users can increase delivery rate of web push notifications
There are various reasons that can prevent a web push notification from being delivered. One of them is the presence of subscriptions that are no longer in use:
Pushpad: improvements to deliverability and monitoring
Today we have deployed a new version of Pushpad which improves deliverability of push notifications and make it easier to find and debug any delivery failure.