Campaign Manager 360 is part of Google Marketing Platform 360 is a widely used adserver by Advertisers and agencies.


 
Campaign Manager 360 is a comprehensive system for managing and measuring advertisements, tailored for advertisers and agencies. It provides a centralized platform to oversee digital campaigns across websites and mobile platforms, equipped with a wide array of features for ad trafficking




Steps to create an Advertiser

Creating a New Advertiser: To create a new advertiser, navigate to New > Advertiser and click.


Copying an Existing Advertiser: To copy an existing advertiser, select the advertiser and then click Copy in the advertiser properties. Copies retain the same properties as the original but do not include any campaigns, creatives, or the original's Floodlight configuration.


Deleting an Advertiser: To delete an advertiser, tick its checkbox and then click Delete. Note that you can only delete advertisers that have no associated campaigns.


Putting Advertisers on Hold or Approving Them: Advertisers are initially set to Approved. To temporarily deactivate all ads within an advertiser, select its checkbox and click Status > Set as On Hold. While an advertiser is on hold, none of its ads can serve, though they will still appear as Active in Campaign Manager 360. You can still edit campaigns and properties during this time.

reference - https://support.google.com/campaignmanager/answer/2829356?hl=en#zippy=%2Cmanage-advertisers