Adding +1 buttons to your pages is a great way to help your content stand out in Google search. By giving your visitors more chances to +1 your pages, your search results and search ads could show up with +1 annotations more often, helping users see when your pages are most likely to be useful.
To get started, visit the +1 button tool on Google Webmaster Central. You’ll be able to configure a small snippet of JavaScript and add it to the pages where you want +1 buttons to appear. You can pick from a few different button sizes and styles, so choose the +1 button that best matches your site’s layout.