@Lisa71 -
Platform Analytics is a relatively new feature/application that was released with Washington release and when we upgraded from Vancouver to Xanadu (of course, we got it with the upgrade).
A good starting point to read about Platform Analytics and how it differs from Performance analytics would be here:
https://www.servicenow.com/community/performance-analytics-blog/platform-analytics-enablement-toolki...
Key difference apart from the ones @dan_linton mentioned is that now both Reports and Performance Dashboard will be deactivated and instead we will see only Platform analytics and under Platform analytics, we have a module called Data visualizations which ServiceNow says brings it together.
So, if you are a dashboard user, then you will not notice anything significant but if you are a dashboard creator/administrator then the way these dashboards were created so far have significantly changed.
And of course, the UI has now changed from CoreUI to Next Experience UI.
Rollback: For some reason if you wish to do a rollback, then the safest way is goto sys_properties and set com.glide.par.unified_analytics.enabled = false and then goto "par_dashboard.LIST" and select all dashboards page by page, and use the rollback option via the actions menu on the table list view. ServiceNow has confirmed this is the best way to do a rollback (if needed so). Note: Not all dashboards once migrated can be rolled back to former state. I think ServiceNow calls these specific ones "technical dashboards" based on what I remember reading.
Similarly, if you wish to re-migrate these to Platform Analytics after rollback, then you can do the reverse which is to set com.glide.par.unified_analytics.enabled = true and then goto "pa_dashboards.LIST" and select all dashboards page by page, and use the migrate option via the actions menu on the table list view.
But to migrate first time, simply using Migration center provided by ServiceNow.
Please mark my reply as Helpful/Correct, if applicable. Thanks! Might take a second for you and will help me 🙂
