Google’s answer to Facebook’s like button is the +1.
You can display the +1 button to show what you like or recommend on the internet. You can display the +1 button on a number of pages like you webpage, blog or even your article link/ad. More than this you will also be able to see the button besides the Google search results.
If you choose to show your +1 tabs publicly then visitors of your Google profile can view all the links you have +1’d. However, If you decide to keep your tab private then only you will be able to view the content of your personal +1 tab.
Be ready for +1 seo and promotion coming your way soon 🙂