To use the partner-provided Campaign Manager 360 (CM360) to measure results, you need to:

The correct answer is Place the CM360 impression tracking URL into the campaign form in Ads Manager because to measure campaign results using Campaign Manager 360 (CM360), you need to insert the impression tracking URL directly into the campaign setup. This allows CM360 to track ad impressions and attribute them to the correct campaign. Creating reports in Ads Manager or linking to Google Analytics, or placing the URL on your website, will not enable CM360 to track impressions properly.