Within each Advertiser, the Administrator can control who should have access to that Advertiser. This enables you to limit access to this Advertiser to specific individuals. Users that are NOT granted access will not be able to see the Advertiser or any of the campaigns and data under that Advertiser.
By default Advertisers are "Open" - ALL users will have access.
Click here for complete information about Security and how to setup and manage restrictions.
Next Step: Advertiser Settings – Currency