Facebook to launch new dating service: 'Not just hookups'

Facebook will roll out a series of features around dating, Facebook CEO Mark Zuckerberg announced Tuesday. 

He gave few details, but said the service will be optional, not viewable to users' friends, and will only suggest partners who are outside someone's friend group.

"This will be focused on long-term relationships, not just hookups," Zuckerberg said at the company's developer's conference, called F8. 

Zuckerberg noted that 200 million people on Facebook are listed as single, and that 1 in 3 marriages in the U.S. start online. (This is true of recent marriages, according to a 2013 study.)

News of the social network's new dating venture sent shares of online dating site Match Group tumbling as much as 19 percent after Zuckerberg announced the feature. 

Zuckerberg announced several other new Facebook initiatives as well, including one called "Clear History," a tool that will allow users to see what apps and websites share information with Facebook and delete this information from their account. Get live updates from F8.