If you currently have or plan to publish an Extension that contains multiple types of Plugins (Workflows Tasks, Reporting Widgets, Workflows Events, Survey Questions), then this feature is for you!
While your Extension description communicates the overall functionality, it may not make sense to display it to users when they are selecting a Workflows Task, or Workflows Event, or Reporting Widget, etc.
Follow this documentation to add a specific description for each Plugin type as shown in the 2-minute demo below: