What is a Push Notification Service?

A push notification service represents a platform through which an application delivers messages to end users or other applications. The alerts and notifications that appear on your smartphone screen originate from application servers that initiate these communications without user action. Organizations deploy push notifications for diverse purposes: informing users about upcoming promotions, signaling application events to other systems, or triggering specific device behaviors. Beyond mobile platforms, push notification channels extend to web browsers, wearable devices, voice systems, and SMS.

Types of Push Notifications

Push notification systems fall into two primary categories based on their communication direction and purpose.

Application-to-Application (A2A)

A2A notifications travel between applications to communicate about events or status changes. Common examples include supply chain status updates, information modifications, and system alerts.

Application-to-Person (A2P)

A2P notifications flow from applications or services to individual users across one or multiple channels. These encompass news alerts, promotional content, and transactional messages.

How Push Notifications Work

Three essential components enable push notification delivery: a publisher that originates the message, a receiver that accepts and responds to notifications, and a service that bridges these parties. Publishers utilize application servers to dispatch notifications, receivers opt in to receive them, and push notification providers leverage platform-specific services to establish connections between senders and recipients.

Implementation Steps for Mobile Push Notifications

Register the app with the push notification service

Your mobile application must connect with the operating system's native push notification service. iOS applications integrate with Apple Push Notification service (APNs), while Android applications use Firebase Cloud Messaging (FCM). APNs, introduced as the first mobile push notification service, enabled iOS app developers to create and deliver notifications to Apple devices. This same approach later expanded to Android through Firebase Cloud Messaging. Registration with the push notification service provider grants access to the service API.

Process service tokens

Push notification providers maintain active connections with each registered application and device. Upon registration, the push notification service generates a device token that developers can store and utilize to send notifications to specific users.

Start to send notifications

The application server transmits notification content and device tokens to the push notification service API. After the server submits this request, the service delivers the notification to user devices, where it appears on lock screens, notification centers, or app icons based on user preferences. Users can then interact with the notification to access the app or website.

Common Use Cases for Push Notifications

Marketing campaigns

Organizations frequently employ push notifications to deliver promotional content directly to user devices. Discount information, new product announcements, and critical updates reach audiences through this channel. These notifications effectively drive user actions such as app downloads, service registrations, or product purchases. Both web and mobile push notification strategies help businesses re-engage previous customers.

Transactional notifications

Financial institutions send transactional notifications to alert customers about account activity including deposits, withdrawals, balance changes, and other modifications. This capability proves especially valuable for mobile banking users. Push notifications help customers monitor their finances and detect suspicious activity, while also delivering payment reminders and transaction alerts.

One-time passwords

Push notifications can deliver one-time passwords (OTPs) for user authentication during login attempts or purchases. Users receive OTPs via mobile device, email, SMS, or other channels, then enter the code to verify identity without exposing sensitive information. OTPs function as a component of multi-factor authentication (MFA) systems.

Emergency alerts

Government agencies utilize push notifications to distribute emergency alerts to populations. These notifications communicate information about natural disasters, Amber Alerts, terrorist threats, and severe weather conditions.

Medical services

Healthcare providers send push notifications containing appointment reminders, medication alerts, and test results. These notifications encourage patients to take medications or schedule follow-up visits, while also informing healthcare providers about patient status changes.

Shipping updates

Retailers and suppliers use push notifications to keep customers informed about order status throughout the fulfillment process. Notifications alert customers when orders ship, enter delivery, or arrive, while also providing tracking numbers and estimated delivery dates. This capability extends to upstream and downstream supply chain management.

Customer feedback

Mobile push notifications prompt customers to rate products or services and provide comments. Organizations also deploy push notifications for surveys to understand customer preferences and gather insights about opinions.

Social media

Social media platforms send push notifications about new posts, comments, and content updates. These notifications enable users to quickly access and engage with fresh content without manually checking for updates, effectively increasing app engagement and returning inactive users to platforms.

Benefits of Push Notification Services

Push notification services have become integral to mobile applications since smartphones emerged. Apple introduced APNs in 2009 for iOS, enabling publishers to reach users without requiring app launches. Google launched its push service in 2012 for Android. Users now expect push notifications from mobile applications, and these services benefit both organizations and their audiences.

Increased engagement

Push notifications effectively engage users by delivering relevant information, reminding them to use applications, and encouraging them to explore features and promotions. These notifications typically achieve higher open rates compared to email, SMS messaging, and chat applications.

Improved retention

Organizations can craft targeted and relevant messaging by segmenting users based on past behaviors, locations, interests, and other attributes. This personalization approach increases customer retention and revenue.

Greater user control

Users often prefer push notifications because they offer straightforward control mechanisms. Users can opt in to receive notifications and opt out whenever they choose.

AWS Push Notification Support

Amazon Web Services (AWS) provides Amazon Simple Notification Service (SNS) to address push notification requirements. Amazon SNS operates as a fully managed publish-subscribe service supporting both A2A and A2P messaging scenarios.

For A2A messaging, Amazon SNS delivers push-based, many-to-many messaging for distributed systems, microservices, and event-driven serverless applications. For A2P messaging, Amazon SNS enables communication with customers through SMS texts, push notifications, and emails.

Key capabilities of Amazon SNS include:

  • Integration of applications using first-in, first-out messaging
  • Secure encryption of notification message delivery
  • Capture and distribution of events from more than 60 AWS services
  • Delivery of push notifications and SMS messages to customers globally

Source: AWS News Blog