Cloud Kicks has been using media cloud for the last three months and now wants...

When integrating Media Cloud with the Google Ad Management platform and needing to specify the callout URL, a consultant should create a Named Credential (D) in Salesforce. Named Credentials provide a secure way of storing and referencing authentication details and endpoint URLs for external services, thereby simplifying the setup of secure API callouts from Salesforce to external platforms like Google Ad Manager.References:

https://help.salesforce.com/articleView?id=sf.named_credentials_about.htm

https://www.salesforce.com/products/media-cloud/overview/