You can use the Banner Performance report to identify which specific Creative assets (Banners, Text Links, Coupons/Deals, Product Links) are driving clicks and sales within a specified time-frame.
You can access the Banner Performance report here.
Simply set the date range on the left side of the page and click 'Filter' to populate the report with data. This report will display the following high-level performance metrics for each Creative asset that's generated some level of activity (at least one click) during the time-frame that you specify:
Total Unique Hits (Clicks)
Total Net Sales
Total Number of Sales
Total Number of Voids
Once the report has been populated you can click the ID associated with a specific Creative to generate a detailed report specifically for that Creative. This will allow you to review the above performance metrics broken out by each contributing Affiliate.
You can also filter this report by Affiliate to identify which Creative assets, if any, a specific Affiliate is generating traffic for within a specified date range.