my bad -- its not dynamic labelings its using dynamic legend. so one graph could esentially replace many graphs if you get my drift. It would allow for massive reuse.
Are you asking about the Time Value Order column in my sample pbix file?
That column is used as the sort-by column for Time Value Text. Since Time Value Text contains a mixture of granularities (Date, DateTime, Month and Year in my case), it is impossible to sort this column based on its own values.
So Time Value Order is not directly used in any visuals, but set as the sort-by column for Time Value Text in Modeling = > Sort by Column. I also hid it in report view as the end user has no use for it.