A standard business manager in Facebook allows you to create only one advertising cabinet.
However, after a certain period of time and successful use of advertising campaigns, Facebook can give the opportunity to create up to four additional advertising cabinets.
With long-term and effective use of a business manager, Facebook may allow the creation of up to 20 additional advertising cabinets, but this rarely happens.
The advertising cabinet is the main place where advertising activities are carried out on Facebook. The launch of an advertising campaign takes place in the same way as on a regular account.