Upgrade to Business Manager from an existing business account
We're asking customers to upgrade to Business Manager in order to improve the security and ease with which they manage their Pages, ad accounts, and apps.
Are you currently signing in with an email address and password that are different from your personal Facebook profile, in order to manage your business Pages or ad accounts? If so, you may have seen a notice asking you to upgrade these accounts to Business Manager by February 16, 2015.