Facebook said Tuesday it now counts 2 billion active monthly users, as the social giant's founder Mark Zuckerberg highlighted his new mission, not just connecting people, but helping them find common ground.

"As of this morning, the Facebook community is now officially 2 billion people!" Zuckerberg wrote in a post marking the milestone.

"We're making progress connecting the world, and now let's bring the world closer together," he wrote. "It's an honor to be on this journey with you."

Facebook's announcement came as it works to redefine its purpose, led by Zuckerberg who traveled the U.S. this year to better understand what people want out of the social network.

"We realize that we need to do more too," the 33-year-old said in a recent interview with CNN Tech.

"It's important to give people a voice, to get a diversity of opinions out there, but on top of that, you also need to do this work of building common ground so that way we can all move forward together."

The firm's new mission statement says it seeks "to give people the power to build community."

Zuckerberg's message was echoed by Naomi Gleit, a vice president at the internet giant, who credited the millions of small communities emerging within Facebook for helping drive growth.

More than a billion people take part each month in Facebook "groups," built around everything from sporting interests to humanitarian projects, she said in an online post Tuesday.

For Gartner analyst Brian Blau, Facebook appears to be striving to become "more of a community company than a technology company."

He noted that Facebook's role in last year's contentious U.S. election, during which social networks were awash in misinformation, may have been a motivating factor.

Founded in 2004, the social media behemoth hit the billion-user mark five years ago.

"These billion levels are significant milestones, and certainly it is a lot of people around the planet," Blau said. "It goes to show the power of community, and how people are naturally drawn to each other."

TV shows

As it has grown, Facebook has consistently updated features to fend off challengers such as Snapchat and adapt to trends such as the migration of news and streaming video online.

In the latest move to deepen its reach, Facebook revealed Monday it is starting production on high-quality television series and gaming shows to be broadcast on its platform.

Working with a small group of partners, Facebook hopes to start putting out episodes of its forthcoming series by the end of the summer, Nick Grudin, the vice president for media partnerships, told AFP.

"Our goal is to make Facebook a place where people can come together around video," Grudin said, noting that Facebook and its collaborators would "experiment with the kinds of shows you can build a community around -- from sports to comedy to reality to gaming."

Facebook's initiative follows similar moves by Netflix, Amazon and the online television platform Hulu -- a joint venture by Disney, Comcast, 21st Century and Time Warner -- who have thrown themselves into content production, as have YouTube and Apple, although on a more modest scale.

Battling hate

Chief among the challenges it faces -- along with other social media giants -- Facebook is under pressure to tackle the proliferation of hate speech and extremist content, trolls and misinformation, while safeguarding freedom of speech.

Facebook, Microsoft, Twitter and YouTube announced Monday the launch of an anti-terror partnership aimed at thwarting the spread of extremist content online.

The "Global Internet Forum to Counter Terrorism" intends to share engineering, research and knowledge to help "continue to make our hosted consumer services hostile to terrorists and violent extremists," the companies said.

Each of the technology giants has been working individually to prevent its platforms or services from being used to promote or spread extremist views.

"We believe that by working together, sharing the best technological and operational elements of our individual efforts, we can have a greater impact on the threat of terrorist content online," said a joint statement.

Facebook this month launched a series of counter terrorism measures in the wake of attacks in Manchester and London.