(MENLO PARK, Calif.) -- How you search Facebook is about to change.
Facebook on Tuesday introduced a new product called "Graph Search." It turns some of the personal information people have shared on Facebook into a powerful searchable database.
For the social network's 170 million users in the U.S., it's bound to change the way people interact with their Facebook friends.
Facebook allowed ABC News Nightline behind the scenes ahead of Tuesday's product launch, an event shrouded in secrecy and rife with speculation. Company officials had sent out a tantalizingly vague invitation: "Come and see what we're building."
CEO Mark Zuckerberg has long wanted to develop a social search engine, even hinting back in September that one might be in the works. The new feature gives users the ability to easily search across the network and their friends' information. Company officials say they believe it has the potential to transform the way people use Facebook.
Until now, the search bar you saw when you logged in to your Facebook page wasn't very powerful. You could only search for Timelines -- your friends' pages, other peoples' public pages and business or product pages.
But now, after close to a year and a half of development, the new "Graph Search" will allow you to search and discover more about your friends and other information that's been put on the world's largest social site.
Inside the Crucial 24 Hours Before Facebook's Graph Search Launch: Watch at 12:35 a.m. on ABC News Nightline
The new tool, available only to a limited set of U.S. users at first, turns key information that nearly a billion people have shared on the site -- including photos, places, and things they "like" -- into a searchable database tailored to your individual social network. The new tool allows you to search across your friends' Timelines, without having to go to each of their Timeline pages to find out if they like a specific place or thing.
"I can just type in a short, simple phrase, like friends who like soccer and live nearby," Facebook product manager Kate O'Neill, told ABC News’ Nightline in an exclusive behind-the-scenes interview. "And now I'm getting the exact group of people that I'm looking for, so I can play soccer and ask them if they want to kick the ball around with me after work."
O'Neill was able to narrow down the search in a demonstration only to show women.
The tool can search your friends' publicly shared interests, photos, places and connections. O'Neill showed ABC News how you can search for different musical artists and see which of your friends like them. She also explained how you can search a company and see which of your friends, or friends of your friends, work there. Additionally, you can search for photos of a specific place -- like Big Sur -- and the Graph Search will return images your friends might have taken of the location.
Right now, you can't search for things that were shared in a Timeline post or an event. However, O'Neill confirmed that this would be added to Graph Search later.
The new product raises obvious privacy questions. Will personal information now pop up in the Graph Search, even if you never wanted to share it? How about those photos you never wanted to have on Facebook in the first place, or the ones you thought you were sharing only with your close friends? "[Privacy] is something, of course, we care a lot about, and so from the very beginning we made it so that you can only search for the things that you can already see on Facebook," Tom Stocky, one of the lead Graph Search senior engineers, told Nightline.
Stocky also pointed ABC News to Facebook's recent privacy tool changes, which allow you better to see what personal information your friends and others can see on Facebook. O'Neill showed the new Activity Log tools as well as the photo "untag" tool, which lets you contact others who might have a photo of you posted that you'd wish they'd take down.
When asked if users can opt out of the new search in general, Stocky said that they can choose to change the privacy settings on each of their pieces of content.
"For every post you shared, there's an option so you can share this publicly, or with friends, or only me. For each item you basically have the control over what audience that's shared with," he said.
The feature might seem like a simple product addition, but not only has it been in the works since mid-2011, it puts Facebook in a unique position as a search engine competitor to Google, Yahoo! and Microsoft's Bing.
However, Facebook says it hopes to provide something entirely different -- something that's more personalized. "I think the thing that makes this product the most interesting is the content that you have access to," Lars Rasmussen, one of the lead engineers who has worked on the tool since its inception, said. "I think most of the stuff people are going to see again or discover anew is not going to be public, and that's what makes it so new and different from any other product out there."
Rasmussen and Stocky both worked at Google before joining Facebook.
Google itself has tried to get into social search with its Google Plus and Google search integration. But while Google handles over 100 billion search queries a month, a small fraction of its users have embraced its Google Plus social network.
Microsoft took another route with Bing, partnering with Facebook to show relevant Facebook information on the right side of a Bing.com page when you enter a search query. But the success of the Bing site depends on your friends opting in to the social search function.
Like Google and Microsoft, Facebook will likely be able to generate new revenues with search ads.
"You do a search on Google because you have a particular thing that you're after, the ads that they have shown are very compelling," Danny Sullivan, the editor of Search Engine Land, told Nightline. "And so this already has some of that same monetization. You'll go through and start to do a search, and it's already suggesting in some cases that there's an ad and that there's somebody who's already a match."
But Facebook says that isn't in the immediate plan. "Right now we are focused squarely on the user experience," O'Neill said. "This product was built for the people who use Facebook, to help them really to take advantage of the information that they've shared with each other. There aren't any ads in the results of Graph Search. We may monetize this further in the future, but we have no immediate plans to do so."
Either way, Facebook is hoping you'll start searching more when the Search Graph begins in a limited test to Facebook's U.S. users starting Tuesday. You can go to facebook.com/graphsearch to get on the waiting list.
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