Facebook are expanding the availability of Business Manager, a tool that lets large advertisers manage all of their ad accounts, Pages, apps and permissions in one place.
Business Manager is currently available to a limited number of advertisers in the USA but Facebook plan to roll it out internationally within a few weeks. One major benefit is that admins can use Business Manager to access ad accounts and pages without needing to be connected with others as friends making it easier for campaign permissions to be managed in-house and with external agencies.
Read more here https://business.facebook.com/