Pending changes are visible in the page history, where they are marked as pending review. The latest accepted revision is displayed to the general public, while logged-in users see the latest revision of the page, with all changes applied. When editors who are not reviewers make changes to an article with unreviewed pending changes, their edits are also marked as pending and are not visible to most readers.
Both logged-in users and unregistered users who click the "edit this page" tab edit the latest version as usual. If there are pending changes awaiting review, there will be a dropdown box next to the article title, pointing to the pending changes.
Pending changes may be used to protect articles against persistent vandalism, violations of the biographies of living persons policy, and copyright violations.
Administrators may apply pending changes protection to pages that are subject to heavy and persistent vandalism, violations of the biographies of living persons policy, or insertion of content that violates copyright. Pending changes protection should not be used as a preemptive measure against violations that have not yet occurred, nor should it be used to privilege registered users over unregistered users in content disputes. Pending changes protection should not be used on articles with a very high edit rate, even if they meet the aforementioned criteria. Instead semi-protection should be considered.
In addition, administrators may apply temporary pending changes protection on pages that are subject to significant but temporary vandalism or disruption (for example, due to media attention) when blocking individual users is not a feasible option. As with other forms of protection, the time frame of the protection should be proportional to the problem. Indefinite PC protection should only be used in cases of severe long-term disruption.
Like semi-protection, PC protection should never be used in genuine content disputes, where there is a risk of placing a particular group of editors at a disadvantage.
Editors without administrator privileges can request page protection if the above criteria are met. Removal of pending changes protection can be requested of any administrator, or at requests for unprotection.
Acceptance of an edit by a reviewer is not an endorsement of the correctness of the edit. It merely indicates that the edit has been checked for obvious problems as listed above.