Google Plus Share is one the best method to get your links indexed by Google and also best link building method. This is will give an enormous advantages like it will also increase the +1 count and also shared post is visible in the Friends/Followers circle where other user can also +1, comment and re-share the same original post. Not only that it can also be shared as Public so that your post can also get chance to visible in Google Search Result, which tends to make organic traffic to your page.