Meta-Wiki
Meta-Wiki is the global community site for the Wikimedia Foundation's projects and related projects, from coordination and documentation to planning and analysis.
Meta-Wiki was first created as "Meta-Wikipedia" in November 2001 to make the English Wikipedia less cluttered, by moving all meta-content (content about the Wikipedia website and its users), as opposed to actual content (encyclopedia articles), to a new wiki. Since its upgrade to Wikipedia's custom MediaWiki software, Meta has become a multilingual discussion forum used by all Wikimedia language communities. As the number of Wikimedia projects and translations increased, so too did Meta's scope. Meta comprises 133,216 articles. Many of the older pages here are still worded as being specific to Wikipedia, but arguably many now apply to all Wikimedia projects.
Other meta-focused wikis such as Wikimedia Outreach are specialized projects that have their roots in Meta-Wiki. Related discussions also take place on Wikimedia mailing lists (particularly wikimedia-l, with its low-traffic equivalent WikimediaAnnounce), IRC channels on Libera, individual wikis of Wikimedia affiliates, and other places.