Workflows automate processes for reviewing, approving, and publishing articles. This can save you time and make sure articles that may be ready to publish, but need approval, are not overlooked. If the item requires review and approval before it is published, a workflow can transfer the item to the worklist of the person who is responsible for approving it. That person can approve the article or send it back for further edits.
The image below shows the path the draft of an article or file might have to follow if, after the author has written or uploaded it, one or more people have to review and approve it before publication.