What does it mean to modify in word? For example.

Revision means, for example, you submit a document to the leader for review, and the leader thinks that the revision is inappropriate, and the original text before the revision is still there. Write down the modified content in the prompt box, and write down which leader modified it (depending on the user name defined in the Office installation), so that you can show a document to many people, and their modifications and your original text can be referenced and modified when they come back.