Final answer:
The placement performance report is a helpful tool when using site and category exclusions.
Step-by-step explanation:
A helpful report when using site and category exclusions is the placement performance report.
This report provides insights into the performance of your ads on websites, topics, or placements where you have excluded them. It shows you how many impressions, clicks, and conversions your ads would have received if you hadn't excluded them. By analyzing this report, you can identify potential missed opportunities and reconsider your exclusions.
For example, if you have excluded a category of websites from showing your ads, the placement performance report can help you determine if there are any high-performing websites within that category that you may want to include in your targeting.