Google+ aims to make sharing on the web more like sharing in real life.
At the heart of Google+ are their circles. Circles help you share with just the people you want to, whether you’re sending an inside joke to your family circle or sharing that unbelievable photo with everyone. Google+ lets users create the most relevant social circles that fit their sharing style and life. The Google +1 sharing button is one of the most popular among Po.st publishers. When a user shares content from your blog or website with the Google +1 share button, the content appears seamlessly into their news feed with a title and custom URL. Google +1 users can also include their own comment on the post and share your content with their entire social network.
It’s very easy for publishers to add the Google+ share button into their web pages. In order to add the Google+ share button, publishers can integrate the Po.st share widget and customize it with the following two Google+ sharing button options:

Google+ Share Button
Enter this customization code to add the Google+ share button to your Po.st widget
Google+ Counter Button
Enter this customization code to add the Google+ counter button to your Po.st widget