After 14 years at Facebook, COO Sheryl Sandberg announced this week that she's leaving the company. WSJ's Deepa Seetharaman describes how Sandberg helped build Facebook's business and faced the ...

Facebook CEO and founder Mark Zuckerberg testifies during a U.S. House Committee on Energy and Commerce hearing about Facebook on Capitol Hill in Washington, D.C., April 11, 2018. Saul Loeb/AFP ...