der Geschäftsbereich
business unit
A specific part or department of a company that is responsible for a particular area of tasks or products.
Sie leitet den Geschäftsbereich für erneuerbare Energien.
She heads the business unit for renewable energy.

business unit / division
Loading your saved state.
business unit
A specific part or department of a company that is responsible for a particular area of tasks or products.
Sie leitet den Geschäftsbereich für erneuerbare Energien.
She heads the business unit for renewable energy.

This word is made up of three parts: 'Geschäft' (business) + the linking -s + 'Bereich' (area). So it literally means 'an area of the business' and is therefore easy to understand.
Der neue Geschäftsbereich soll nächstes Jahr profitabel sein.
The new business unit is expected to be profitable next year.
In a professional context, this word is often used with certain verbs. Typical ones are: einen Geschäftsbereich 'leiten' (to head), 'aufbauen' (to build up), 'ausbauen' (to expand), or 'verantworten' (to be responsible for).
Er verantwortet den gesamten Geschäftsbereich Marketing.
He is responsible for the entire marketing business unit.
'Geschäftsbereich' (business unit) is a formal term from business language. You often find it in annual reports, organizational charts, and job advertisements.
Das Unternehmen gliedert sich in vier verschiedene Geschäftsbereiche.
The company is divided into four different business units.
area / field
'der Bereich' and 'der Geschäftsbereich' can both mean an area of responsibility or a field of work. 'Bereich' is general and can be used in many contexts, including outside companies. 'Geschäftsbereich' is much more specific and belongs to the language of business. It means a part of a company that is responsible for particular products, customers, or tasks. The words can be confused because a 'Geschäftsbereich' is also a 'Bereich'. But if you are not explicitly talking about a company, 'Bereich' is usually more natural. If you mean a company structure, 'Geschäftsbereich' is more precise.

Nach der Pause spricht die Leiterin mit der Kollegin über den neuen Geschäftsbereich.
After the break, the manager talks with her colleague about the new business unit.
Bitte achten Sie beim Training besonders auf den Bereich der Schultern.
During training, please pay special attention to the shoulder area.