Yahoo Finance

• Mark Zuckerberg emphasizes Facebook's efforts on messaging, stories and video as key to the company's future.

• The three product lines have shown promise but face tough challenges when it comes to monetization.

Mark Zuckerberg on Tuesday laid out his vision for the future of Facebook FB by highlighting three priorities: video, messaging and Stories.

The Facebook CEO used his quarterly earnings call to highlight that these three areas are critical to the future of the social media company and to explain the unique challenges each one faces.

Stories 'will be bigger' than News Feed

"I just think that this is the future," Zuckerberg said when talking about the Stories feature that Facebook copied from Snapchat SNAP and introduced across its numerous apps. With Stories, users share full-screen photos or videos with their friends or followers that disappear after a day, rather than sticking around permanently.

"People want to share in ways that don't stick around permanently, and I want to make sure that we fully embrace this," Zuckerberg said.

While Stories have been a hit on certain Facebook apps like Instagram, the feature has been adopted more slowly on the main Facebook app. Regardless, Zuckerberg said he believes the opportunity with Stories "will be bigger" than that of News Feed, the scrolling wall of posts from friends that has dominated most Facebook users' experience for years.

Facebook is still trying to figure out how to monetize Stories. Zuckerberg and Chief Operating Officer Sheryl Sandberg explained that the company's ad products for stories are not yet as robust as Facebook's older ad products. The company will need to build out these tools as well as train advertisers on the best way to create ads for Stories, Sandberg said. Thus, it remains unclear when ad revenue for Stories will converge with the revenue from feed ads, Zuckerberg said.

"I can't tell you just yet what that time frame is going to look like, but I think we're well positioned over the long term because we're leading in Stories and in basically every country," he said.

Messaging: Speed is the key

People now send about 100 billion messages each day across its services as people shift more of their interactions with one another into private conversations on WhatsApp and Messenger, Zuckerberg said.

Facebook's biggest competitor when it comes to private messages is Apple's iMessage , Zuckerberg said. The company plans to improve its two messaging apps by making them easier to use, faster, adding payment features and continuing to improve their security.