It's a more formal and emphatic way of saying "yes" than just "ja", and is often used in a military or other authoritative context. It can also be used to express agreement or understanding in a more general setting.
Here are some examples of how "jawohl" can be used:
* "Jawohl, Herr Oberst!" (Yes, sir! - in a military context)
* "Jawohl, ich verstehe." (Yes, I understand.)
* "Jawohl, das ist richtig." (Yes, that is correct.)
While it is generally considered polite and respectful, "jawohl" can also sound overly formal or even aggressive in some situations. It's best to use it cautiously and only when appropriate.