This is another Google tool to make people more socialize. I hope it will be soon roll out across all Google applications. Google +1 is similar to Facebook like button that provide easy way to share information where ever you find it.
Like Google Buzz you will have full control over this feature. To use this feature, you will need a public Google profile where people can see your recommendations. All your connected friends easily can see your recommendations using public profile.
As of Google Privacy declaration, you can view your recommendations on the +1 tab on your public profile page. You can remove your individual recommendations from the item list. You can also opt-out from +1 recommendations anytime.
The +1 button will appear in search result but why people recommend without exploring search result and one thing is sure people won’t like to come back on search result page to click on +1 button. Also, Search is more personalized and many people don’t like to share their search habits. This tools could be great tool for other Google services and third party websites. Let’s see when this tool fully roll out.