site_slogan
The site_slogan is a single tag which is used to output the site’s tagline (labeled as Site tagline in the Basic Preferences).
The slogan is a brief (255 chars max) tagline or description of your site which can be used, for example, in XML feeds.
General display of Slogan
<p><txp:site_slogan /></p>
As content filler
The slogan could be used for the content attribute of the description metadata element. Either whole…
<meta name="description" content="<txp:site_slogan />" />
or partial…
<meta name="description" content="<txp:site_slogan />. And the rest of your pithy description would go here." />