It is more keeping count of the number of sites you visited and the number of alerts, etc. Of course you could check this and see exactly what is displayed and post a screenshot of non-private areas.
I haven't seen this pop-up yet, so I can't say with any certainty the exact content, but my guess it would be similar to the old 30 day security report or the new my.avast.com account Activity Log tab in the Devices.
See image example of the Activity Log, I don't know if the report you mention will be a graphical one like this with only details of any alerts or a text based one.