Google +1 button make the search results sociable, everytime you click +1 button for a url, the url will get promoted in the searching rank results when your friends search the similar keywords.
I made a test by using my three G+ accounts: A(12000 followers) B(500 followers) C(10 followers). A/B/C , have google connections for each other, including gmail, buzz, reader and G+.
I search 2 keywords and choose the URL to click +1 button by signing in the three G+ accounts one by one. Then I search the same keywords by signing in A/B/C one by one, I would like to see how the search results influnced by your google friends. Below is the conclusion:
1. You can not see every +1d made by your google friends although they click +1 button. I thought it might be a postpone. Sometimes your friends click +1 button for a URL, but you don’t say the +1d made by your friend behind the URL.
2. Your close google friends’ +1 will make the regarding URL promoted in your searching results. Google is very smart to evaluate the relationship between you and your google friends. The quantity of google+ followers is not that important.
After the test, now I understand why google want every google profile is real name. The reason is stop spamming, stop some bad guys to register many G+ accounts to click their own websites. Real name means everyone can only one google profile. Only the google account who have profile can click +1 button.
The sociable searching rank results is very hard to get polluted by spammers.Google+ and +1 button will do an very important role in a sociable new google.