What do you think about Google+?Can be it important for SERP?And do you give a "+" for sites that you like?Or you consider it useless.I am wondering because I don't know if I must to add Google + sign in my site.Thanks for your opinion!
Google won’t provide such information, but I suppose the next best thing is the collective opinion of a large group of people who make their livings getting sites to rank in search engines.