Extension:ArticleMetaDescription

ArticleMetaDescription extension adds SEO-friendly  tags containing a brief snippet of the article to article pages' HTML.

Additionally said description for the Main Page only can be overridden by editing the  interface message.

Usage
ArticleMetaDescription automatically takes the first paragraph of the article and puts it into the  tag inside the page header section. All templates (infoboxes, tables etc.) are ignored by default.

It's possible to set predefined description for the wiki's main page (the name of which is specified in ) by putting desired text into the   message.