Google has copied many things from many web applications around the globe. Well, “Google +1 Button” is something which is very similar to Facebook’s Like feature.
Provided you have a public Google profile, when you search in Google and if you find the result more relevant, you can recommend to your buddies by using the +1 button in front of the results, If a friend of yours searches for the similar terms , (Provided he has signed in to Google account) , Then your recommendation of the result will be shown and he can choose to navigate to that result.
When you perform a search, Recommendation s from all of your friends will be shown to you. +1 button will always be “+1” and it wont increase with the count as per the Google Video shown , but you will surely come to know about how many friends recommended a particular result.