What does 'Important message' mean in X-Sign Broadcast?

What does 'Important message' mean when I publish the message in X-Sign Broadcast?

Important message means that this content is first priority, once it is published it cannot be cancelled on the board by pressing it or clicking it

 

Tip:

The only way to cancel Important message:

Go to X-Sign Broadcast web > Schedule Management > Click Retrieve the message Icon.