I'm not interested in meta descriptions for SEO or SERP purposes. I am interested in them because they provide relevant info about the site to people who are scanning search results, which has a direct effect on "click-through" rates.
Google shows titles (blue/link) and descriptions (black/text), so it shows descriptions based on the Q2A question's description. However, if there is no question description (just a question title), then Google displays by default the immediate content towards the top of the Q2A site. So, if question title is, "How to you do XYZ?" and additional question info is "How do you change XYZ on the site, etc, etc?", then Google will show these (blue title link/black description text).
But sometimes, a user may just submit a question title which requires no further explanation, such as "What do you think of XYZ?". In this case, Google will display that title "What do you think of XYZ?" in the search results, but as for the description, since there is no additional question explanation, Google just displays the first (or random) content it encounters on the site, e.g. "Welcome to Q&A site, etc, etc".
Is it possible to specify meta descriptions for title-only posts, tag pages, category pages, etc. Basically, these are pages where there is no unique content besides the title. For example, it would be nice to specify a description for tag pages, e.g. <meta name="description" content="Here are all of the questions that have been tagged with the keyword $keyword at $sitename"/> . And this is what would be displayed on Google. Same thing for title-only questions, [if no description, then]<meta name="description" content="$question_title was asked by $user on $date" at $sitename. />. If nothing else, if a question is posted with a title and no further description, it would be nice to have the question title imported as the given meta-description.
There's a way to do this sort of thing with Wordpress with custom header commands. Here's the Wordpress article
Any ideas? Thanks...