If posts are the life blood of a successful blog, then comments are probably the heart as they encourage the author and provide a discussion mechanism around a story*. The problem is that blogs can be seen as an island in the ocean surrounded by social media continents such as Google Plus and Facebook. The islands may not get much attention.
That’s where the plugin Google+ Comments for WordPress comes in. It’s simple to install and adds a tabbed comment interface at the end of each post where visitors can comment using their identities on their favourite social media site.
I left a Google Plus comment on a previous post and allowed it to be shared on Google Plus. I got a few replies on that post which also appeared on my blogh. I wouldn’t go sharing every comment you make from your blog. Spamming is spamming, whatever way you do it.
* On Youtube of course it’s usually the reverse. Never read the comments on a popular Youtube video. It’ll hurt your brain."Integrate Google+ and Facebook Comments in your WordPress blog",