Reverting a contribution is sometimes appropriate. However, reverting good-faith actions of other editors can also be disruptive and may lead to the reverter being temporarily [[WP:BLOCK|blocked]] from editing. The [[WP:3RR|three-revert rule]] (part of the [[WP:Edit warring|Edit warring]] policy) limits the number of times an editor can revert edits (including partial reversions) on a page.
== Before reverting ==
Consider carefully before reverting, as it rejects the contributions of another editor. Consider what you object to, and what the editor was attempting. Can you improve the edit, bringing progress, rather than reverting it? Can you [[Wikipedia:Reverting#Do a partial reversion when appropriate|revert only part of the edit]], or do you need to revert the whole thing?
In the edit summary or on the talk page, succinctly explain why the change you are reverting was a bad idea or why reverting it is a better idea. In cases of blatant vandalism, uncontroversially disruptive changes or unexplained removals, the amount of explanation needed is minimal. But in the event of a content dispute, a convincing politely-worded explanation gains much importance and avoids unnecessary disputes.