Board Thread:General Discussion/@comment-27171569-20160120024836/@comment-4731443-20160120025829

You will find some info on the subject here: Help:Administrator. Essentially, you are automatically the admin of any wiki you found. For the rest, you can become an admin when a bureaucrat of a specific wiki makes you one. The reasons/criteria for this depend on the wiki. Some may have policies addressing promotions, others will simply offer promotions to valuable contributors after a certain time or grant the permissions upon request.