Google+ does not currently include any advertising. The company does deliver personalized advertising to users across its properties. Social advertising, however, generally refers to ads that are served to users based on their social contacts' activities on Google+.

Google will apparently first look to introduce the B2B "social features to businesses worldwide," according to the posted job description. The marketing manager will also help determine how Google will talk about the advertising at launch, focusing on "core features," "social ads" and "analytics and platforms," the job listing indicates.

Daina Middleton, global CEO of the digital marketing firm Performics, said that even B2B businesses are struggling with their conventional sales models and are increasingly turning to "social tools."

It's not clear exactly how B2B social advertising would work, and Google did not immediately respond to a request for comment. But industry insiders suggested it would be similar to business-to-consumer marketing. Martine Hunter, creative director at MLT Creative, suggested it might consist of having people who do purchasing professionally give a "plus one" to particular brands on Google+, essentially recommending them.