FILE - In this Wednesday, June 21, 2017, file photo, Facebook CEO Mark Zuckerberg speaks as he prepares for the Facebook Communities Summit in Chicago. Facebook is once again tweaking the formula it uses to decide what people see in their news feed to focus more on personal connections and take the spotlight off brands and news articles. Facebook says it will highlight posts people are most likely to engage with and make time spent on social media more "meaningful."
FILE - In this Wednesday, June 21, 2017, file photo, Facebook CEO Mark Zuckerberg speaks as he prepares for the Facebook Communities Summit in Chicago. Facebook is once again tweaking the formula it uses to decide what people see in their news feed to focus more on personal connections and take the spotlight off brands and news articles. Facebook says it will highlight posts people are most likely to engage with and make time spent on social media more "meaningful." Nam Y. Huh, File AP Photo
FILE - In this Wednesday, June 21, 2017, file photo, Facebook CEO Mark Zuckerberg speaks as he prepares for the Facebook Communities Summit in Chicago. Facebook is once again tweaking the formula it uses to decide what people see in their news feed to focus more on personal connections and take the spotlight off brands and news articles. Facebook says it will highlight posts people are most likely to engage with and make time spent on social media more "meaningful." Nam Y. Huh, File AP Photo

Q&A: What Facebook's shift could mean to users, businesses

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