google+ use in seo???

[Paul]

As it is a product of Google itself so sharing your site updates through your G+ account will make your new urls crawl faster and also get indexed quickly in Google database. And also the more you have followers and connections in Google+ the more you will be considered as a high asset to the SERP's by Google as it shows your authorship and also google looks it likely as more audience liked & therefore high valued content.