You can use advertiser groups to bundle advertisers so that you can view reports on the whole group at once.
You might use advertiser groups to organize multiple brands under one corporation, or to sort them into different groups for each team at an agency (one advertiser group for each bundle of advertisers that a team works on).
Create and apply advertiser groups
Click All Advertisers in the left navigation menu and select or create an advertiser.
In the Properties tab, under Identification, and choose a group from the Advertiser group menu. To create a new group, type a new name into the search field. Click the new name and Save.