Push messaging is everywhere. You can see it used in almost all of the top apps today. If you take a look at your most frequently used apps, they tend to have a couple of things in common. They almost always provide a very useful service and they typically employ push messaging to deliver the service in a timely manner.
Push implementations are not the most high-profile, visible aspect of any app, but they are critical in ensuring that our devices receive that important update, notification, or content at precisely the right moment.
How push messaging works ...