SAN FRANCISCO — Facebook said on Friday that it planned to prioritize high-quality news on the social network by allowing its users to rank news sources that they see as the most credible and trustworthy.

The initiative, which follows an overhaul that Facebook announced last week to emphasize posts, videos and photos shared by friends and family, will not increase the amount of news on the social network. But the move has implications for what news will be consumed on Facebook, potentially favoring the most familiar names in media that are seen as the most credible, while tilting away from lesser-known and less-trusted outlets without solving the issue of whether news could still be distorted.

“There’s too much sensationalism, misinformation and polarization in the world today,” Mark Zuckerberg, Facebook’s chief executive, wrote in a post on Friday. “We decided that having the community determine which sources are broadly trusted would be most objective.”

The shift is another signal of Facebook’s ability — this time using the collective power of its more than two billion members worldwide — to play kingmaker with publishers. Many publishers have long relied on Facebook to reach audiences, and they largely reacted with disappointment last week when the company said it would play down news over all.