Allow filtering by change tag in recent changes, page history, user contributions and new pages.
Has no effect if no tags are defined in the valid_tag database table and there are no extensions enabled which have defined their own tags.
- ↑ Extensions can define and store their own tags and make them available by using the ListDefinedTags hook. Extension:AbuseFilter does this: when creating one or more filters which tag edits for review, filtering by change tag in recentchanges, etc. is enabled when $wgUseTagFilter is set to true.