+1 button now lets visitors share links to your pages on Google+. If someone wants to start a conversation about your content, it’s easy for them to do so. Second, you can use +Snippets to customize the name, image and description that appear when your content is shared. Finally, new inline annotations help increase engagement after users see a friend’s recommendation right on your page.
The +1 button opens up your site to a valuable new source of traffic with sharing on Google+. +Snippets let you put your best face forward by customizing exactly what appears when your content is shared. When you +1 content, a snippet of information will appear. Below is the sytax for setting up what you would like to appear in your snippets.
<h1 itemprop="name">This is the article name</h1>
<img itemprop="image" src="thumbnail.jpg" />
<p itemprop="description">This is the description of the article.</p>
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