Board Thread:Support Requests - Getting Technical/@comment-25330335-20161026185109/@comment-27345308-20161101214709

Once AbuseFilter tags an edit, it will appear in Special:Tags, so you don't need to create it at all. But to create the tag name, yes, you use MediaWiki:Tag-tagname pages. There are also MediaWiki:Tag-tagname-description pages for the description of the tag that appears in Special:Tags