Click on "Google +Like" ,and you will get a new webpage where you have to install it ,and after that open google.com and by example write facebook.com and you will see your likes and your facebook friends like to google social network.
Last month, Google finally unveiled its long-awaited +1 effort, wherein Google users recommend search results by clicking a "+1" button next to the result. Then, when their Google "friends" search, those results are shown as recommended. The addition of +1 followed the previous month's addition of social recommendation into search results using Twitter and other social sharing.
Facebook - the center of many users' online social sharing experience - has been notably absent from all of this. A browser extension called "Google +Like" has come along, however, to bring the best parts of the two rival companies together into a social search experience.