With the release of ArcGIS Enterprise 10.9 came an updated release for StoryMaps with some added functionality. There is a great Story Map of the newly available features by Apurvah Shah available here: "StoryMaps in Enterprise 10.9".
One added feature that may have not gotten as much coverage yet is the new functionality to configure stories with Google Analytics tracking id's to aid in metric capturing. I'd like to cover the Enterprise-specific instructions from the base document "Configuring story settings" in a bit more detail.
As the base document notes, Google Analytics have to first be enabled for the Enterprise environment with administrative credentials first. Then, individuals with access to publishing StoryMaps should be able to attach their Google Analytics tracking ID in each of their StoryMaps.
Enabling Google Analytics tracking options:
Adding a tracking Id for Google Analytics as a publisher:
Here is a short video stepping through the whole process in an Enterprise 10.9 environment: