I am working on updating an app's notifications and I was looking through the documentation around the push payload and I saw the thread-id
key. In the documentation it says:
Provide this key with a string value that represents the app-specific identifier for grouping notifications. If you provide a Notification Content app extension, you can use this value to group your notifications together.
I'm not totally sure what they mean by grouping your notifications together
.
What is a use case for this key?