description

 description  is the second line of text under the title of a blog or site. It’s sometimes called a tagline or subtitle.

Silo examples
Blogger has a field titled "description" under the title of the blog, as does Tumblr; Wordpress calls it "tagline".

In the html, tumblr uses, Wordpress uses   and Blogger uses

This maps to the Atom subtitle element and the RSS channel:description.

Indieweb Examples
unmung transforms the atom/rss fields above into a p-summary on the h-feedh-feed as html parsed h-feed