Account groups is a feature in your Ads Manager that allows you to organise and access multiple advertising accounts from one place. This feature may be useful if you manage a very large number of ads or if you manage ads for multiple businesses.

If you manage multiple accounts from a single login, you'll automatically see a list of all these accounts when you visit your Ads Manager. To see a specific group of accounts, click the account groups link that appears on the left-hand side of that page.

If you're already looking at campaigns within an individual account in Ads Manager, you can still navigate to a different account group. In the Account section on the left, click the blue arrow, then click on the account or account group that you'd like to see from the drop-down that appears.

* Nguồn: Facebook