A push notification is a message that appears on your device without you opening an app
When an app sends you a push notification, it shows up as a small alert on your phone or computer screen — even if you have not opened that app recently or at all. The message pops up over whatever you are doing, usually with a sound or vibration, and stays visible until you dismiss it or tap it. Unlike email, which sits in your inbox until you check it, a push notification interrupts you in the moment.
The app does not need your permission to send the notification in the real-time sense — it sends it whenever the app's developer decides to send it. You gave permission when you installed the app or when the app first asked "Allow notifications?", but you did not choose the exact moment or content of each individual message.
Push notifications come from the app's servers, not from your device. When something happens — a message arrives, a sale starts, a game you play has an update — the app's company sends a signal to your phone or computer, which then displays the message. This is different from a reminder you set yourself, which your device triggers based on a time you chose.
Key Takeaways
- Push notifications are messages sent by apps that appear on your screen when ready, even when you have not opened the app.
- The app's company decides when to send notifications, not you, though you can turn them off in your device settings.
- Push notifications work through the app's servers sending a signal to your device, which is why they arrive in real time.
- You can control which apps send notifications and what type of alerts they use — sounds, badges, or silent messages.
- Apps send notifications to keep you engaged, alert you to messages or updates, or remind you to use their service.
Why apps send push notifications
Apps send notifications for several reasons, and understanding the reason behind each one helps you decide which ones to keep. A messaging app like WhatsApp or Messenger sends notifications so you know someone has written to you without checking the app constantly. A weather app might send a notification when a storm is coming. A shopping app sends notifications about sales or items you looked at but did not buy.
Some notifications are genuinely useful — a banking app alerting you to unusual activity, a calendar app reminding you of an appointment. Others are designed to pull you back into the app so you use it more often. A game might notify you that your energy has refilled, or a social media app might tell you that someone liked your post. These notifications are sent because they work: people tap them, open the app, and spend more time there.
Apps also send notifications to feel urgent or important. A notification that says "You have 3 new likes" or "Sale ends in 2 hours" is designed to make you feel like you might miss something. This is why learning to recognize which notifications actually matter to you — versus which ones are trying to create a false sense of urgency — is the first step in controlling them.
How push notifications reach your device
When you install an app, it registers with your phone or computer's notification system. For iPhones and iPads, this is Apple's push notification service. For Android phones, it is Google's Firebase Cloud Messaging. For computers, it depends on the operating system — Windows has its own system, as does Mac.
When the app's company wants to send you a notification, they send a message to these services, not directly to your device. The service then delivers it to your phone or computer, which displays it on your screen. This system exists because apps cannot stay connected to your device all the time — it would drain your battery and use too much data. Instead, the notification service acts as a middleman that wakes up your device just long enough to show the message.
This is why you can receive notifications even when an app is completely closed. The app's servers know how to reach you through the notification service, so they can send you a message anytime. You do not have to be using the app, or even have it open in the background.
The difference between push notifications and other alerts
A push notification comes from an app's servers and appears on your screen without you asking for it. A reminder is something you set yourself — you tell your phone "remind me at 3 PM" and your device triggers it at that time. A text message or email comes from another person or service, not from an app you installed. A badge is a small red number on an app's icon showing you have unread messages, but it does not pop up on your screen.
Some apps use multiple types of alerts. A messaging app might send you a push notification when someone writes to you, show a badge on its icon, and also send you an email if you have not read the message after a few hours. Each one is a separate system, and you can usually control each one independently in your settings.
What information is in a push notification
A push notification usually contains a title, a short message, and sometimes an image or icon. A banking app might send: "Unusual activity detected: $500 charge at 2:15 PM." A social media app might send: "Sarah liked your photo." A delivery app might send: "Your order is out for delivery." The message is kept short because it has to fit on your screen, and you are supposed to tap it to open the app if you want more details.
Some notifications include actions you can take without opening the app. A messaging app might let you reply directly from the notification. A calendar app might let you snooze the reminder. These are called actionable notifications, and they save you the step of opening the full app.
The information in a notification is sent from the app's servers, so the app's company knows what they are sending you. This is why some people worry about privacy — the company knows when you receive the notification, and they can see whether you tapped it. You cannot see this data yourself, but the app's company uses it to understand how many people are reading their notifications and which messages get the most responses.
How to tell if a notification is real or designed to manipulate you
Real notifications give you information you actually need: a message from someone, a delivery update, a security alert, an appointment reminder. Manipulative notifications create a false sense of urgency or try to make you feel like you are missing out. "You have 1 new like" or "Your friend is online now" or "Sale ends in 1 hour" are designed to pull you back into the app, not to tell you something important.
One way to test a notification is to ask yourself: "Would I be worse off if I never saw this message?" If the answer is no — if you would be fine never knowing that someone liked your post or that a sale is happening — then it is probably a notification designed to keep you engaged rather than to serve you. If the answer is yes — if you need to know about a package delivery or a security alert — then it is a notification worth keeping.
Another test is to notice how the notification makes you feel. Real notifications usually make you feel informed or relieved. Manipulative notifications often make you feel anxious, rushed, or like you are missing out. If a notification consistently makes you feel bad, that is a sign it is worth turning off.
Where push notifications appear on different devices
On an iPhone or iPad, notifications appear at the top of the screen as a banner, or in the notification center if you swipe down from the top. On an Android phone, they appear at the top in the status bar and in the notification shade if you swipe down. On a Mac, they appear in the top right corner. On Windows, they appear in the bottom right corner.
Each device also lets you customize how notifications look and sound. You can choose whether a notification makes a sound, vibrates your phone, shows a preview of the message, or just adds a silent badge to the app's icon. These settings are usually found in your device's main Settings app, under Notifications, and then by app name.
Frequently Asked Questions
Can an app send me a notification if I have not installed it?
No. An app can only send you notifications if you have installed it and allowed notifications when it asked. However, a website can send you notifications if you have given permission in your web browser — this is different from an app notification but works similarly.
Do push notifications use my data or battery?
Push notifications use very little data — usually just a few kilobytes per notification. They do use a small amount of battery because your device has to wake up to display the message, but the impact is minimal unless you receive hundreds of notifications per day.
Why do some apps ask for notification permission when I first open them?
Apps ask for permission because your device requires it — you have to explicitly allow notifications before an app can send them. This is a privacy protection. If you deny permission, the app cannot send you notifications, though it can still function normally.
What happens if I turn off notifications for an app?
If you turn off notifications, that app will no longer send you any alerts. You will not see badges, sounds, or pop-ups from it. You can still use the app normally — you just will not be interrupted by messages from it. You can turn notifications back on anytime in your settings.
Can I get notifications from an app without opening it?
Yes. That is the whole point of push notifications — they reach you even when the app is closed. The app's servers send the notification through your device's notification service, which displays it on your screen regardless of whether the app is running.