UPDATE (7/9/12): After a few productive weeks in platform preview, we're rolling out +1 recommendations to all users today. Thanks for your feedback at Google I/O, in the discussion forums, and on our Google+ page. We're always eager to hear from you -- so keep it coming.
Working on +1, we often hear people say they want to see more of what their friends recommend. Likewise, when we talk to site owners, they ask us to help them show more relevant content to their users. Today, we are rolling out a new feature of the +1 button in platform preview: when users hover over a +1 button, they will see recommendations for other great content on your site.
For example, when I go the the Chrome Web Store and look at +1 recommendations on the Gmail app, I see related apps and recommendations from friends.
To keep these recommendations more relevant and on-topic, they will always refer to pages on the same domain or subdomain as the +1 button.
If you’ve already added the +1 button to your site, there’s nothing more you need to do. Recommendations will work across all +1 buttons for all users, whether or not they’re signed into Google+. This update will go live to all of your users in the next few weeks.
If you want to see recommendations today, sign up for the developer preview group and tell us what you think. The +1 team and I would love to hear from you! As always, we are iterating quickly and are hungry for your feedback.
Join the conversation on Google+.