1) Share Links: The +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. Now, Google+ users can share webpages with their circles, directly from the +1 button. From there you can comment, choose a circle and share.
When you share content from the +1 button, you’ll notice that we automatically include a link, an image and a description in the sharebox. This is called as "+snippets,".
+Snippets let you put your best face forward by customizing exactly what appears when your content is shared.
For example, if you’re running a movie review site, you might want visitors to share posts containing the title, movie poster, and a brief synopsis:
3) Inline Annotations: The new inline annotations help increase engagement after users see a friend’s recommendation right on your page.
Now, when a person visits a page that someone they know has +1’d, they can see a name and face reminding them to pay special attention to your content. Here’s how it looks:
To add inline annotations, you need to update your +1 button code. Visit the configuration tool , select ‘inline’ from the ‘Annotation’ menu, and grab a new snippet of code.