Have you ever noticed that many pages in the wiki have at least one category listed at the bottom of the page? In many cases, two or more categories are listed on a page. Why do we need categories? They work similarly to an index, grouping articles with similar subjects, localities, or topics. Categories (along with other features such as cross-references, lists, and infoboxes) help users find information, even if they don’t know that the information exists or what it’s called. Every article should have at least one category.
Members of the wiki support team have been spending hundreds of hours categorizing pages that weren’t categorized when they were created. It’s a simple matter to add a category as an article is created or edited. That procedure would save the support team many hours of work. The category is added at the bottom of the page. In Wikitext, an example would be:
[[Category:Indians of North America]]
There are pages in the wiki that will give detailed instructions and information about categories. See https://www.familysearch.org/learn/wiki/en/Help:Categorization and https://www.familysearch.org/learn/wiki/en/FamilySearch_Wiki:Categorization.
An example of pages that are under a specific category is: https://www.familysearch.org/learn/wiki/en/Category:All_articles_with_unsourced_statements
The pages in this category need some loving care to ensure the validity of the statements made in the article.