Re: General help
There are two quick videos that provide a great orientation on how to use the new Reporting tool on these pages of the Knowledge Center
Detail reports are like regular tables of data and Summary reports are like pivot tables with multiple dimensions and groupings on both the X and Y axes.
Filter conditions are the primary piece shared between Detail and Summary reports in a report that happens to have both types or reports combined. That would be useful in cases where you want to look at both the details and the summarized (aggregated) values of a measure given equivalent boundary conditions or filter settings.