Editorial Tasks are activities that someone (a member of your team or you) should complete before a certain due date. If a task is not completed in time, Nelio Content simply tells the user so.

In the previous screenshot you can see how an uncompleted, overdue task looks like—it’s written using a red font color and there’s a warning sign.
If the task is related to a post (as the previous screenshot depicts), its quality analysis won’t be positive until all tasks are completed:

Nonetheless, you’ll always be able to publish a post (even if its score is poor or improvable).