Google's +1 button to add content recommendations
Google is preparing a new +1 feature that will present users with other content recommendations when they hover over the +1 button with their mouse.
This could help deliver increased clicks for Web site as users will be presented with more content options similar to the content they just viewed. As an example, a visitor to Google's Chrome Web Store clicking the +1 on the Gmail app would see suggestions for apps like Offline Google Mail, Google Calendar, and Picasa:
"To keep these recommendations more relevant and on-topic, they will always refer to pages on the same domain … Read more