Users today have a hard time remembering what apps they even have on their device. Notifications help these services deliver timely and relevant information to users, and in doing so, staying top of mind.
A recent study showed that mobile users receive an average of 63.5 notifications per day, with most notifications coming from messaging and email applications. Push notifications at their core are simply a way of alerting users to information that they have opted-in to from apps and services.
Notifications encompass nearly every possible use case and type of service, including other communications mediums like email, SMS, and VoIP. Three basic types of notifications: Transactional, System, and User notifications.