Board Thread:Support Requests - Community Management/@comment-26978548-20170906193840/@comment-27345308-20170906195048

Just click on one of those and edit them. For example, editing this page will change the "Admin" tag to whatever you edit the page to. Note that when you edit that page the changes will only appear for English users - users of other languages will still see tags of respective MediaWiki subpages you most likely can't edit (for example, French users will see this tag). The tag change will also not appear immediately after you edit the page, so wait a few hours after editing the tag page.

You can also use the ProfileTags script from Dev Wiki to apply custom user tags to users.

EDIT: Maybe I'm wrong about the change not appearing for a few hours, it just appeared immediately for me after changing the tag on my sandbox.