Explanation
When you make changes to a guide that is in the Published state, the changes are saved as a new revision of the guide, but they are not deployed to the production environment. The guide tile in the OGL console shows a label of "Unpublished Revision" to indicate that there are changes that have not been published yet. You can preview the changes in the development environment, but the users will not see them until you publish the guide again. References: Creating OGL Content Course, Enhancing OGL Content Course, [Oracle Guided Learning Content Developer Foundations Associate Rel 1 Exam]