Complex sentence: When communication occurs within the same organization, it is called internal business communication and it's related to maintaining and improving the morale of employees, procedures and prescribing methods, directing the workers, keeping the management informed and announcing policies and organizational changes.
Split into simpler sentences: When communication occurs within the same organization, it is called internal business communication. Internal communication consists of communication within the organization which includes but not limited to procedures and prescribing methods, directing the workers, keeping the management informed and announcing policies and organizational changes.