Mobile Applications

SAN FRANCISCO — Mark Zuckerberg, Facebook’s chief executive, downloaded a popular new app, Phhhoto, on Aug. 8, 2014, and...

When Mark Zuckerberg appeared onscreen at Facebook’s virtual Connect conference on Thursday, smiling as he wandered through sterile rooms...

Facebook knew that an ad intended for a 13-year-old was likely to capture younger children who wanted to mimic...