Push notifications are messages that apps send to your device even when you're not using them
A push notification is a short message that an app sends directly to your phone, tablet, or computer. It appears as a popup, banner, or badge on your screen — the little red number on an app icon, for example. The key difference from other messages is that the app doesn't wait for you to open it. Instead, the app's server pushes the message out to you whenever it wants to.
This happens through a system that runs in the background on your device. When you install an app and allow notifications, you're giving it permission to use that system. The app can then send you updates about news, messages, reminders, sales, or anything else its maker decides. You don't have to be looking at your phone or have the app open — the notification will still reach you.
Push notifications are different from email or text messages because they're controlled by the app maker, not by you sending a request. An email sits in a server until you check your inbox. A push notification travels from the app's server to your device on the app's schedule, which is why they can feel intrusive if you haven't set boundaries.
Key Takeaways
- Push notifications are sent by apps to your device without you opening the app, and they appear as popups, banners, or badge numbers.
- Each app can send notifications only if you've turned them on in your device settings — you control which apps can notify you and how.
- Apps use notifications to send news, messages, reminders, sales alerts, and other updates on their own schedule, not yours.
- Turning off notifications for an app does not delete the app or prevent it from working — it only stops the messages.
- You can customize notifications per app, choosing whether to see them on your lock screen, hear a sound, or see a badge number.
How push notifications reach your device
When you turn on notifications for an app, your device registers with a notification service. On iPhones and iPads, that service is Apple Push Notification service (APNs). On Android phones, it's Google Cloud Messaging (GCM) or Firebase Cloud Messaging (FCM). On Windows computers, it's Windows Push Notification Services (WNS). These services act as the middleman between the app maker and your device.
Here's the flow: the app maker's server sends a message to the notification service. The notification service then delivers it to your specific device. Your device receives the message and displays it on your screen. This all happens in seconds, which is why notifications feel immediate. The app maker never directly contacts your device — they send the message to the service, which handles the delivery.
This system is why notifications work even if you've closed the app or turned off your screen. The notification service keeps a connection open on your device at all times, waiting for incoming messages. When one arrives, it wakes up your screen or plays a sound to get your attention.
What information apps can include in notifications
A push notification can contain just a title and a short message, or it can include more details depending on how the app is built. Common examples are a news headline with a link, a message preview from a chat app, a reminder with a time, or a sale alert with a discount code. Some notifications let you reply or take action directly from the notification without opening the app.
The app maker decides what goes in each notification. They might send you a notification every time someone messages you, every time a news story matches your interests, or every time a price drops on an item you're watching. Some apps send dozens of notifications a day; others send only a few. This is why notification control matters — without it, your device can become overwhelmed with messages.
Why apps use push notifications instead of other methods
Apps prefer push notifications because they reach you immediately and don't require you to check an inbox. Email is slower and requires you to open your mail app. Text messages cost money to send at scale. In-app messages only show up when you open the app. Push notifications are fast, free for the app maker, and they interrupt you — which is exactly what the app maker wants if they're trying to get you to notice something.
From a business perspective, notifications drive engagement. They remind you that an app exists, pull you back into it, and encourage you to take action. This is why shopping apps send sale alerts, social media apps send notifications about likes and comments, and news apps send breaking news alerts. The app maker benefits from keeping you active and returning often.
The difference between notifications and other types of messages
Push notifications are not the same as text messages (SMS), emails, or in-app messages. A text message goes through your phone carrier and costs the sender money. An email sits on a server until you check it. An in-app message only appears when you open the app. A push notification is sent by an app's server through a notification service and reaches your device whether the app is open or not.
You also control them differently. You can turn off push notifications for a specific app in your device settings without affecting texts or emails. Turning off notifications does not uninstall the app or stop it from working — it only stops the messages. This is an important distinction because some people worry that disabling notifications will break the app's core functions. It won't.
How to see which apps have notification permission
On most devices, you can see which apps are allowed to send notifications by going to your settings. On iPhone, open Settings, tap Notifications, and scroll through the list — each app shows whether notifications are on or off. On Android, open Settings, go to Apps or Applications, select an app, and look for Notifications. On Windows, open Settings, go to System, then Notifications & actions, and scroll to see which apps are allowed.
This list shows you which apps have asked for and received permission. Some apps ask for notification permission when you first install them; others ask the first time they want to send a message. You can change your answer at any time by toggling the setting off or on. Turning notifications off for an app is immediate — the app will stop sending you messages right away.
Common reasons apps send notifications and how to manage them
Different apps send notifications for different reasons. Messaging apps notify you about new messages. News apps notify you about breaking stories or topics you follow. Shopping apps notify you about sales, price drops, or order updates. Social media apps notify you about likes, comments, and friend requests. Fitness apps notify you about activity goals. Calendar apps remind you about upcoming events.
If you find yourself overwhelmed by notifications, you have options beyond turning them all off. Most apps let you customize which types of notifications you receive. You might allow messages but turn off promotional alerts, or allow reminders but turn off social notifications. You can also change how notifications appear — some devices let you silence the sound, hide the preview text on your lock screen, or turn off the badge number. Explore your app's notification settings to find a balance that works for you.
Frequently Asked Questions
Do push notifications use my data or battery?
Push notifications use very little data — usually just a few kilobytes per message — and have minimal impact on battery life. The notification service on your device is designed to be efficient. If you're concerned about data usage, turning off notifications for specific apps won't noticeably change your bill. Battery drain from notifications is rarely a problem unless an app is sending hundreds of them per day.
Can I turn off notifications for one app but keep them for others?
Yes. You can control notifications individually for each app in your device settings. Turn off notifications for apps you don't want to hear from, and leave them on for the ones you do. You can also customize each app's notification settings — for example, allowing message notifications but blocking promotional ones. Changes take effect immediately.
What happens if I turn off notifications for an app?
The app will stop sending you messages, but it will continue to work normally. You can still open it, use its features, and receive messages when you're inside the app. Turning off notifications does not uninstall the app, delete your data, or prevent it from functioning. It only stops the push messages from appearing on your device.
Why do some apps keep asking for notification permission?
Some apps ask for permission every time you update them or every time they want to send a new type of notification. This is by design — the app maker wants to make sure you've explicitly allowed notifications. You can say no, and the app will still work. If an app keeps asking after you've said no, check your settings to confirm notifications are turned off.
Can I see old notifications I dismissed?
On most devices, you can view your notification history by swiping down from the top of your screen (on Android) or swiping down from the top right (on iPhone). This shows recent notifications you've received. The exact steps vary by device and operating system version. Some notifications disappear after a set time, so very old ones may no longer be available.