Manual outbound calls refer to calls dialed via the Enter number field. You can use the Enter number field to make 'one-off' calls, or calls not related to any campaigns or queues.
There may be times that you will need to place manual outbound calls, for example, if you need to return a call from a customer who got disconnected.
Not all agents can perform manual outbound calls. You need to be given permission by the admin to make outbound calls.