This template should be used when certain necessary information is absent from the article. Please open a corresponding discussion detailing the missing information on the article's discussion page before placing the tag. If a consensus is reached that the information should be included, it is inserted in the article and the template is removed, or if no one contested the proposal, keep waiting to prevent adding unsourced information.
This may assist in avoiding edit-warring by making a good faith attempt to achieve consensus before putting a particular piece of information in an article, especially if it's controversial information. This template adds articles to the Category:Articles to be expanded.