Google +1 button will improve the search ranking of your site
Now google try his best to make google search results to be sociable, and google launched +1 button which you can considered as “like” of Facebook. SNS websites is the biggest threat to Google, the top 1 SNS website is FACEBOOK.
Google thought if the search results getting sociable, the people will like the search results more. And I do think so too. Google +1 button means that when you find a website is good, you can click +1 button. Doubtless to say, if a website get more +1 button, the search ranking of the website will get better. When you click +1 button for a website, your friends in google reader, google buzz and google+ will find the website easily since the ranking of the website get higher in their search ranking results due to your +1 button.
You can imagine, if you got tens of thousands of contacts in google+/google buza/google reader, everytime when you click +1 button for a website. The search ranking of the website will get promoted in your friend circles of GOOGLE.
To prove it, I made a test. I signed in my google+ and searched keywords, then I choose NO.91 of the search results and click +1. Then I signed in another GOOGLE+ to search the same keywords, surprised I found the search rank the websites promoted to NO.31 from No.91.
If you have more google contacts, your +1 button will more helpful to a website in search ranking.
It is time for you to add +1 button to your website, you can not miss it. If you use wordpress , you can easily download&install +1 button plugins. Please click here: http://blog.jacobwg.com/wp-plus-one/