Hi Craig
Yes. the main thing is that when you open a web map and save it, the extent of the map at the time you save it becomes the map's initial/home extent the next time you or someone else views it. So if your web map is being displayed in an app like a Story Map app, that extent change will in most cases be reflected in the story map, unless you, depending on the particular app you are using, have used the option to configure a custom extent for that web map. For example in Story Map Series, Journal and Cascade, when you add a web map into the story, you can override the default extent inside the Builder and specify the extent you want to show on the map. In that case, the web map will be displayed at that extent irrespective of the saved extent in the web map.
Rupert
