Brand Reports page shows you your Index, your Position, Minimum Price, Best Matched Competitor on each category. You can click on the 'Details' button to go to a more detail view, including price history chart, price position chart, and index of each competitor on that brand. You can also filter the results.
The video below shows the details of brand reports page which has the same reporting structure with category reports page
It's time to take a look at the excel reports here!