A push notification is a message that appears on your phone, tablet, or computer without you asking for it
Push notifications are short messages sent directly to your device by an app or website. They show up as a popup, banner, or badge on your screen — even when you are not using the app. Unlike email, which you have to check, or text messages, which come through your phone carrier, push notifications are delivered by the app developer or website owner through their own system.
The word "push" means the message is sent to you rather than pulled by you. A weather app might push a notification about rain tomorrow. A news site might push a breaking story. A shopping app might push a sale alert. You do not have to open the app to see it — the notification appears on your lock screen or in your notification center.
Key Takeaways
- Push notifications are messages sent directly to your device by apps and websites, and they appear without you opening the app first.
- You control which apps and websites can send you notifications through your device settings, and you can turn them off at any time.
- Apps store a token — a unique identifier — that lets the app developer's server know how to reach your specific device.
- Push notifications work differently on phones than on computers, but the basic idea is the same: a message sent to you rather than one you have to fetch.
How push notifications actually reach your device
When you install an app and allow it to send notifications, the app generates a unique token — think of it as an address for your device. The app sends this token back to the app developer's server. Later, when the developer wants to send you a notification, they tell their server "send this message to this token," and the server pushes it through a notification service to your device.
On iPhones and iPads, Apple runs the notification service called Apple Push Notification service (APNs). On Android phones, Google runs Firebase Cloud Messaging (FCM). On computers, the system depends on your browser and operating system — Windows has its own notification system, and web browsers like Chrome use their own services. The app developer does not contact your device directly. They send the message to Apple, Google, or the browser service, which then delivers it to you.
This setup means the app developer never actually knows your phone number or email address just from sending you a notification. They only know the token. If you uninstall the app, the token becomes useless, and they cannot reach you anymore.
What you see and where you see it
On a phone, a push notification usually appears as a banner at the top of your screen or on your lock screen. You might also see a badge — a small red circle with a number — on the app icon. On a computer, notifications typically pop up in the corner of your screen. On a smartwatch, they might appear as a small card you can swipe away.
The notification itself is usually short: a title, a message, and sometimes an image or button. If you tap or click it, the app usually opens to the relevant section — tapping a notification about a package delivery might open the shipping app to your tracking page. You can dismiss a notification by swiping it away or clicking an X, and it disappears.
How to control which notifications you receive
You have full control over push notifications on your device. On an iPhone, go to Settings, then Notifications, and you will see a list of every app that has asked permission to send you notifications. You can tap any app and turn notifications off entirely, or customize what kind of notifications it sends — for example, allowing sound but not badges, or allowing notifications only when you unlock your phone.
On Android, the process is similar: go to Settings, then Apps, find the app, tap Notifications, and toggle them on or off. You can also customize how each app's notifications behave — whether they make sound, vibrate, or appear on your lock screen.
On a computer, the steps vary by operating system and browser. In Windows, go to Settings, then System, then Notifications, and you can control notifications app by app. In macOS, go to System Settings, then Notifications, and customize each app. In a web browser, you can usually manage notification permissions by clicking the lock icon in the address bar.
If an app is sending you too many notifications, you do not have to uninstall it — just turn off notifications for that app. The app will still work normally; you simply will not see the messages.
Why apps and websites send push notifications
App developers send push notifications for many reasons. Some are genuinely useful: a banking app notifying you of a large transaction, a calendar app reminding you of an appointment, a navigation app alerting you to traffic. Others are designed to bring you back to the app: a game reminding you that your energy has recharged, a shopping app telling you about a sale, a social media app notifying you that someone liked your post.
Websites can also send push notifications if you have given them permission in your browser. A news site might notify you of breaking stories. A weather site might alert you to severe weather. A work collaboration tool might notify you of a message from a colleague.
The reason developers use push notifications instead of email is speed and visibility. A notification appears immediately on your device, while an email might sit in your inbox unseen. Notifications are also harder to ignore — they interrupt you in the moment, which is why some people find them annoying.
The difference between push notifications and other message types
Push notifications are different from text messages (SMS), which come through your phone carrier and usually cost money to send at scale. They are different from email, which you check on your own schedule. They are different from in-app messages, which only appear when you have the app open. Push notifications are the middle ground: they reach you quickly and interrupt you, but only if you have given the app permission.
One key difference: push notifications do not require an internet connection to be delivered, but your device does need to be connected to receive them. If your phone is in airplane mode or powered off, notifications will queue up and arrive when you reconnect. Text messages, by contrast, are delivered through cellular networks even if you have no data connection.
Privacy and data considerations
When you allow an app to send notifications, you are not giving it access to your personal information just by receiving a message. The app developer only gets the token — the unique identifier for your device. They do not automatically see your name, location, contacts, or browsing history.
However, what the app does with the notification content is worth thinking about. If a notification says "You have a message from Sarah," the app developer can see that you received that notification. They can track how many notifications you receive, when you receive them, and whether you tap them. This data helps them understand how often people use their app and what kinds of messages get attention.
If you are concerned about an app collecting too much data, turning off notifications is one small step, but it does not stop the app from collecting other information while it runs. If you want to limit what an app can see overall, you can also restrict its access to location, camera, contacts, and other permissions in your device settings.
Frequently Asked Questions
Can I get push notifications if I do not have the app installed?
Not from an app — you need the app installed to receive its notifications. However, you can receive push notifications from websites through your web browser without installing anything. If a website asks permission to send notifications, you can allow it, and you will receive notifications from that site even when you are not visiting it.
Do push notifications use my data plan?
Yes, but very little. A notification is a small message, usually just a few kilobytes. If you have a data plan, notifications will use a tiny amount of it. If you are on WiFi, they use your WiFi connection. If your device is in airplane mode, notifications will not arrive until you turn airplane mode off.
Why do I sometimes get the same notification twice?
This can happen if the notification service tries to deliver a message, does not get confirmation that you received it, and tries again. It can also happen if you have the same app on multiple devices — each device receives its own copy. Checking your notification settings and removing the app from devices you no longer use can reduce duplicates.
What happens to my notifications if I switch phones?
Your old notifications disappear because they were tied to your old device's token. When you set up a new phone and reinstall apps, each app generates a new token for the new device. The app developer's server will start sending notifications to the new token instead. You may need to allow notifications again during setup.
Can someone else send me push notifications if they have my phone number?
No. Push notifications are not sent through phone numbers. They are sent through tokens that are unique to your device and specific to each app. Someone would need to know your device token and have access to the app developer's server to send you a fake notification — which is not something a random person can do.