What is "wikia"

Wikia (formerly Wikicities) is a free wiki hosting service. The site is free of charge, deriving its income from advertising and sold content, publishing most user-provided text under copyleft licenses. Wikia hosts several hundred thousand wikis using the open-source wiki software, MediaWiki. Its operator, Wikia, Inc., is a for-profit Delaware company founded in late 2004 by Jimmy Wales and Angela Beesley Starling—respectively, Chairman Emeritus and Advisory Board member of the Wikimedia Foundation—and headed by Craig Palmer as CEO.