The first section of the report is a graph showing the Error count by type of error. It’s a good view to visually group the errors, so you can quickly see which errors are occurring most often.
The second section of this report shows the errors and information about them:
Where do these errors come from? The SQL Server error log? What about the server event logs? (I'm wondering how thorough the report is. This will determine how much additional checking I should do.)