<http://schema.org/description>
"Social sharing widens your mailing's reach, but it doesn't do so automatically (dangit). Here are five tips to make sure your audience is sharing -- and loving -- your mailings (hooray!)."^^<http://www.w3.org/2001/XMLSchema#string>
<http://support.e2ma.net/Resource_Center/Help_articles/making-the-most-of-social-sharing>