Sheryl Sandberg is an American business executive and the Chief Operating Officer (COO) of Facebook. She previously worked at Google and served as a management consultant at McKinsey & Company. Sandberg joined Facebook in 2008 and has played a crucial role in the company's growth and success. She is known for her advocacy of women's empowerment and gender equality in the workplace. Sandberg's book, 'Lean In: Women, Work, and the Will to Lead,' became a bestseller and inspired a global movement. As COO, Sandberg oversees Facebook's operations and is responsible for driving the company's business strategy. She is recognized as one of the most influential women in technology and business.