Admin Forum:How can I change the site description?

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I mean the meta description attribute in. Please see this main page. There's nothing registered as a meta description tag, so when I google my site I get a bad summary on the search result. How can I handdle this?
 * You could ask for Semantic MediaWiki to be enabled through Special:Contact; it should provide a solution to your issue. 17:41, June 6, 2012 (UTC)
 * I got that. Thanks for the quick answer!