A Label is an action under the Flow group that you can use to create bookmarks in your tasks. You can place labels at one or more points in your task steps, and use them as reference points for Goto actions. Labels can be used in step level error handling by setting up a Goto action to be executed if a step error occurs.
The labels view shows all labels in the task with the label name and the step number.
About the Debug Window
Debugging Tasks Overview