Facebook Marketplace, which lets people buy and sell things like furniture, cars and clothes on the platform, is used in 70 countries by 800 million people around the world each month, CEO Mark Zuckerberg said at the company's F8 developer conference on Tuesday. Additionally, one in three people in the US use Marketplace, he said.

Facebook is a technology powerhouse, racking up ad sales and profit at a rapid pace. Last year, the company reported sales that rose 49 percent percent to nearly $40 billion. Profits, meanwhile, jumped by more than half. About 2.2 billion people -- or roughly 2 out of every 7 people in the world, and more than half the world's online population -- use the service each day, making it among the most powerful companies on the Web.

Zuckerberg also announced that more than 450 million people use Whatsapp Status every day, which, similar to Instagram Stories, allows users to share text, photos, videos and animated GIFs that disappear after 24 hours.

Facebook's F8 developer conference, which is being held in San Jose, is expecting more than 5,000 developers to attend.

The mostly-annual conference began as a time for Facebook to announce major initiatives, such as its technology to connect user's accounts with websites around the web, as well as revamped designs for user's profile pages. Most recently, it's used the event to discuss better ways it's allowing app developers to tie into its services, like games for its Messenger service, augmented reality features for its Facebook app, and new artificial intelligence programs.

CNET's Ian Sherr and Richard Nieva contributed to this report.

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