When the revisions are done, someone must review them and then accept or reject them. The reviewer can deal with revisions one at a time or all at once, and can read the comments and then delete them.
To get rid of markup, use the Accept or Reject buttons on the Review tab, in the Changes group, or right-click in the document to accept or reject changes and delete comments. You can try both of these methods in the practice session.
As changes are accepted or rejected and comments are deleted, the markup that indicates the changes and comments is removed from the document. Accepted changes become part of the document when it is saved.