This document profiles four influential female leaders in the digital age: Marissa Mayer, CEO of Yahoo, with 13 years experience at Google; Sheryl Sandberg, COO of Facebook and former Google executive; Jessica Lessin, founder and editor-in-chief of tech news site The Information and former Wall Street Journal reporter; and Oprah Winfrey, media mogul and founder of OWN television network, recipient of the Presidential Medal of Freedom.