Google + has this section called Sparks. Sparks sorts stories and articles by topic together in one area for you to talk about with your Google + circles that are interested in those topics.
Honestly, for me, it is one of the least used features on Google +. Why? Well, I find the content within the "Sparks" I created to be limited. I am interested in stories on search, Google, SEO and so on. But the content, for the most part, is limited.
It makes me wonder how Google puts together this data. Yes, how SEOs can target Sparks and get their content within the Sparks.
I asked the question in a Google + Post and DeWitt Clinton from Google replied saying:
New algorithms over a new corpus. Still very much in flux and being further expanded and tuned. I'm sure we'll give a tech talk eventually about the technology behind Sparks, but this is very early days still. Watch this space.
Clearly Google + and how Sparks work within Google + is very new.
Some suspect the topics match Google News searches very closely. But comparing Google News results to Sparks was not a perfect match, by far. But maybe the trick is to be included in Google News and then you have a shot of being found in Sparks?
So far, Google + Spark SEO is not existant but give SEOs a few more weeks.