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"Google announced they are expanding the +Post Ads to all advertisers who have over 1,000 followers on their Google+ Pages.  In addition,  they are also testing two new features for +Post Ads.(1) Promoted Hangouts on Air: You can now promote your Hangout on Air with +Post ads that lets users take specific actions before, during, and after the broadcast. Users can RSVP prior to the Hangout, watch the broadcast live, and view a recording after the event.(2) Automatic post promotion: Now you can automatically promote your most recent Google+ post, and pay only when people engage with your content, extending the reach of your social content across the web. Google of course says +Post Ads work great:Forum discussion at Google+ &amp; WebmasterWorld."^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-post-ads-more-18425.html>