Final answer:
Willow Sporting Goods should run the Keyword Blocking Report to address their concern about ads being blocked.
Step-by-step explanation:
The report that Willow Sporting Goods should run to address their concern about ads being blocked is the Keyword Blocking Report. This report will provide them with information on which keywords are being blocked and preventing their ads from being triggered. By analyzing this report, Willow Sporting Goods can adjust their ads to avoid triggering any of the blocked keywords and ensure their ads are shown to the target audience.