What is pushnotification?

A push notification is a short message that appears on a device-like a phone, tablet, or computer-without the user having to open an app or website first. The message is “pushed” from a server directly to the device, alerting the user about something new, such as a chat message, a news update, or a reminder.

Let's break it down

  • Server: The place where the message is created (e.g., a news site, a game, a bank).
  • Push service: A platform that carries the message from the server to the device (Apple Push Notification Service, Firebase Cloud Messaging, etc.).
  • Device token/ID: A unique identifier that tells the push service which device should receive the message.
  • App: The program on the device that registers for notifications and decides how to display them. When the server wants to alert the user, it sends the message to the push service, which then delivers it to the correct device using the device token. The app receives the message and shows it on the screen.

Why does it matter?

Push notifications keep users informed instantly, even when they are not actively using an app. This real‑time communication can boost engagement, remind users of important actions, and improve the overall experience by delivering timely, relevant information.

Where is it used?

  • Messaging apps (WhatsApp, Messenger) for new chat alerts.
  • Social media platforms (Facebook, Instagram) for likes, comments, or friend requests.
  • News and weather apps for breaking stories or severe alerts.
  • E‑commerce sites for order updates, sales, or cart reminders.
  • Banking and finance apps for transaction alerts or fraud warnings.
  • Gaming apps for event invites, rewards, or turn‑based game moves.

Good things about it

  • Immediate reach: Users get information instantly.
  • Higher engagement: Well‑timed notifications can bring users back to the app.
  • Personalization: Messages can be tailored to user preferences and behavior.
  • Low friction: No need for the user to open the app to see the update.
  • Cost‑effective: Sending a notification is cheap compared to other marketing channels.

Not-so-good things

  • Potential annoyance: Too many or irrelevant notifications can frustrate users and cause them to disable them.
  • Privacy concerns: Users may worry about what data is used to target notifications.
  • Battery impact: Frequent notifications can drain device battery faster.
  • Dependence on internet: Push notifications require a network connection to be delivered.
  • Platform restrictions: Each operating system has its own rules, which can limit how notifications are displayed or used.