Cloud kicks is setting up a new instance for media cloud and their sales reps...

To set up the visibility of opportunities in Salesforce Media Cloud such that sales reps only see their opportunities and managers see all opportunities under them, the organization-wide default (OWD) for the Opportunity object should be set to private (D). Then, configure the role hierarchy to ensure that managers can see the records owned by users in their reporting hierarchy. This setup leverages Salesforce's built-in role hierarchy model, where users at higher levels automatically have visibility into records owned by users at lower levels in their hierarchy without the need for additional sharing rules.References:

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

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