<p>With Facebook CEO Mark Zuckerberg under pressure to reassure disappointed investors in the wake of a disastrous initial public offering earlier this year, there may be silver lining for the social networking behemoth. Facebook might find future revenue driven by a social search engine, according to a survey from digital marketing agency Greenlight.</p><p>The survey of 500 people across a range of professions indicated that Facebook could potentially capture close to a quarter of the search market were it to launch its own search engine tomorrow. The study also suggested Facebook could increase its share to 50 percent within just a few years, and could become the second most used search engine in every major market except for China, Japan and Russia, where it would occupy an "uncontested" third place.</p><p>However, the report also noted that although search engine leader Google's social network, Google+, lags far behind Facebook in overall users, Google+ has been more successful than most may have initially speculated when it comes to social searching.</p><p>For instance, 23 percent of Google users have been "+1'ing" listings in Google's search results, giving Google lots of data about what people like. "When compared to the 35 percent of users that Greenlight's survey found routinely 'like' a brand or company on Facebook, then it is not that significantly more than Google's social signal collection, particularly as 28 percent of respondents said they had no idea what '+1' actually meant, which will invariably decrease rapidly over time," Andreas Pouros, chief operating officer at Greenlight, said in a prepared statement. "Essentially, Greenlight's research shows that Google and Facebook will both be front and center in 'Social Search.'"</p><p><a href="http://www.eweek.com/c/a/Web-Services-Web-20-and-SOA/Facebook-Could-Soon-Rival-Google-in-Social-Search-Survey-716175/">Keep reading...</a></p><p>Read also:</p><p><a href="http://www.forbes.com/sites/robertwood/2012/09/15/mark-zuckerbergs-win-win-facebook-tax-tips/">Mark Zuckerberg&#039;s Win Win Facebook Tax Tips</a> (Forbes)</p><p><a href="http://www.morningwhistle.com/html/2012/Technology_0916/214044.html">Facebook&#039;s social search is coming</a> (Morning Whistle)</p><p>Explore: <a href="http://news.google.com/news/more?pz=1&ned=us&ncl=da1rcO671W5JChMY6hhjvSbFGfiWM">12 additional articles.</a></p>