# Widget and In-App Messages
### Pop-up and In-App Message Presentation Behavior
All push notifications in Netmera work automatically—no additional coding is required. However, you can customize pop-up presentations and listen to push callbacks.
By default, when a popup notification or in-app message is received:
* If the app is in the foreground, the SDK displays pop-up notifications and in-app messages **immediately**.
* If the app is in the background, the SDK shows them **when the app returns to the foreground.**
### Receiving Popups and In-App Messages in the Background
To receive popups or in-app messages when the application is in the background, you need to enable **Remote Notifications** under **Background Modes** in **Capabilities**.
### Pop-up Presentation Logic
If a pop-up is received when pop-up presentation is disabled by your code, SDK will store it, and present whenever pop-up presentation is re-enabled. If multiple pop-up notifications are received during that period, SDK stores the most recent notification, and present only that one.
### Enable Pop-up Presentations
To enable pop-up presentation, you need to call the `enablePopupPresentation()` method on the page where you want to display the pop-up.
```dart
Netmera.enablePopupPresentation();
```
{% hint style="info" %}
To show pop-up on the app start or everywhere in the app, please add this to `initState()` method on your `main.dart` file.
{% endhint %}
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