Sheryl Sandberg through the years

Sheryl Sandberg, chief operating officer of Facebook Inc., arrives to testify before the Senate Select Committee on Intelligence on Sept. 5, 2018, in Washington.

Jack Gruber, USA TODAY

Facebook COO Sheryl Sandberg is photographed at her desk at Facebook headquarters in Menlo Park, Calif., June 16, 2017.

Martin E. Klimek, USA TODAY

Sheryl Sandberg joined Facebook in March 2008 after serving as Vice President of Global Online Sales and Operations for Google.

Martin E. Klimek, USA TODAY

Facebook COO Sheryl Sandberg attends an event celebrating the company's 12th anniversary on Feb. 1, 2016.

Martin E. Klimek, USA TODAY

Sheryl Sandberg speaks to guests gathered for a birthday celebration at Facebook headquarters in Menlo Park, Calif.

Martin E. Klimek, Martin E. Klimek-USA TODAY

Sheryl Sandberg, COO of Facebook, and her husband David Goldberg arrive for morning session of the Allen & Co. annual conference at the Sun Valley Resort on July 10, 2013 in Sun Valley, Idaho. Goldberg died suddenly in 2015 at age 47.

Kevork Djansezian, Getty Images

Facebook COO Sheryl Sandberg speaks to a group of young women students at Sequoia High School in Redwood City, Calif June 7, 2013 as part of a tour for her book "Lean In." The sign is a message of empowerment that answers the question "What would you do if you were't afraid?'.

Martin E. Klimek, USA TODAY

French President Emmanuel Macron talks with Chief Operating Officer of Facebook, Sheryl Sandberg during the "Choose France" summit at the Chateau de Versailles, near Paris, on January 22, 2018.

Thibault Camus, AFP/Getty Images