You can use Notification actions to send notifications to the end user or create in-app notifications in your developed application.
Click on the element you want to add Notification actions to and make it selected. Go to the Properties panel and select the action you need under the Notification heading from the drop-down list with + Add Actions.
For example, you can use the Send Push Notification action when you want to send a Push Notification to announce discounts in a shopping application you have developed.