"Not only will you be more effective, you will achieve greater reach at a lower cost", he said, adding that less inventory could see the cost of advertising on Facebook go up.
Facebook's monetization effort reached the peak in October past year, when the company made a decision to further prioritize content from brands, media, politicians if they pay extra fees.
In typical Zuckerberg fashion, the Facebook founder was careful to point out that despite the headlines highlighting the dangers of using social media, spending more time on his platform can actually be good for users. "But I also expect the time you do spend on Facebook will be more valuable".
"While the news-feed changes just announced could be worrisome in terms of an ad growth hiccup, we believe this overhaul was the right move for longer-term user engagement and driving 'meaningful content, ' which remains the core ingredient in Facebook's recipe for success for the coming years", said Daniel Ives, analyst for GBH Insights.
The changes to the timeline, unveiled on Thursday, are meant to emphasise conversations among family and friends, while making posts from businesses, brands and media less prominent.
Last Thursday, Facebook said it would change its News Feed algorithm to prioritize posts from friends and family that spark the most interaction over posts from brands and publishers. So he's shifting the focus for development teams from helping users find relevant content to promoting "more meaningful social interactions".
Some analysts, however, suggest the change could be created to get users to share more information about their lives - which is hugely valuable to advertisers.More news: Tunisian govt unveils social programs after week of unrest
Facebook has been around since 2004, but its leadership on the media market is a very recent phenomenon. These interactions on a post can be shares, comments, messages, reactions, or likes on content. "Facebook has always been criticized for creating "filter bubbles", the echo chambers of friends and like-minded people whose views are reinforced by their friends' posts on the platform", he writes even as the company says that's similar to how people make friends and interact with each other offline. Obama warned against splintering of the society because of the way people use social media.
"Facebook moving publishers and companies to the secondary News Feed is a bid to keep users happy and active on the platform".
Mosseri argues the change could actually help improve the filter bubble issue by showcasing more of what your friends are sharing rather than the publishers you've chosen to follow.
Live videos still rank highly in Facebook's news-feed algorithm, for example, so there remains mileage in broadcasting live on the platform. Mark Zuckerberg announced January 11 that a major focus will be seeing "more from your friends, family and groups", and less from "businesses, brands and media".
In the past week, he has written in the Washington Monthly, the Guardian and the Washington Post about Facebook's role in spreading fake news. Facebook revealed in September that "inauthentic" accounts created in Russian Federation had purchased advertising on the site designed to increase tensions during the election campaign.
This change doesn't portend the death of publishing on Facebook. This is the first time in years that the social media site is making such a big change.
MORE posts, photos, videos from your friends and family.