Mayer's biggest move in her first year came in May when Yahoo doled out $1.1 billion to buy Tumblr, a popular social network. The acquisition was a way to give Yahoo access to a younger audience. Mayer also committed to not "screw up" the social network by leaving its founder David Karp in charge and letting Tumblr operate independently.
Emmanuel Dunand / AFP/Getty Images
Copyright © 2018, Los Angeles Times