The Prospecting Summary is a report of your campaign search(es). It will instantly pop up after a campaign search has run, however, you can access it again by going to your Campaigns screen. For the campaign you’d like to run a report for select the '. . .' on the campaign graph, and choose 'Prospecting Summary'.
The graph will display the following:
-Total Results Found
-Results Deduplicated/Not Added Due to Blacklist
-Results Left after Metrics
You can download this report in CSV form by clicking 'Download Filter Log'. In this file you will be able to see exactly what opportunities were added or were filtered out.