EditorialGuy - 3:02 pm on Aug 9, 2013 (gmt 0) [edited by: Robert_Charlton at 11:41 pm (utc) on Aug 9, 2013]
Coachm, Google has specific markup suggestions:
Appearing in the "In-depth articles" feature
Note that these are recommendations, not requirements.
FWIW, I'd be curious to know how Google plans to differentiate an "in-depth article" from an article that's merely long enough to look like an "in-depth article" when a dumb algorithm is doing the judging. Could there be a human component to this new feature? (Maybe a selection will be vetted, however briefly, by a quality evaluator who'll have to click a checkbox before the article result goes live?)
On the SERPs where I've seen "In-depth articles" results, those results have been at the bottom of the page. Is it better to be featured higher on the page in the normal organic results or lower on the page in the special box? (I assume that the same article won't be listed in both places.) Maybe Google is hoping that the "10 percent" of searchers who want in-depth results can be educated to scroll down when they're looking for comprehensive information instead of a quick answer?
[edit reason] Fixed link to prevent side-scrolling [/edit]
[edited by: Robert_Charlton at 11:41 pm (utc) on Aug 9, 2013]