The Reports tab contains three sections: Category Reports, Brand Reports, and Excel Reports. Your Excel exports from the product page will be listed here. However, daily Excel reports sent by email will not appear in this tab.
Category and Brand Reports provide a summary of your products. You can see the index value for each brand or category, along with your overall position, the cheapest competitor (including your own prices), and the most matched competitor for the brand or category. Additionally, a pie chart displays your positions.