“In order to +1 things, you first need a public Google profile. This helps people see who recommended that tasty recipe or great campsite. When you create a profile, it’s visible to anyone and connections with your email address can easily find it.
Your +1’s are stored in a new tab on your Google profile. You can show your +1’s tab to the world, or keep it private and just use it to personally manage the ever-expanding record of things you love around the web.
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. — Add Plus 1 to your site See also: +1 Button Announcement
At this half way point in the year we can rest assured that changes and developments in search and social media are far from over.
- Google’s +1 Button Challenges Facebook’s Like Across the Web (mashable.com)
- Adding the Google +1 Button to Your Page (webpronews.com)