What is a CEO? What is the purpose of the CEO role vs. founder or any other leadership position at a startup? And how do CEOs think and frame issues the company is dealing with? This unit, which is a subset of the “Role of the Startup CEO” collection, examines these questions. Hear executives who’ve held CEO roles at Twitter, Square, Chegg, Polyvore, Aruba Networks, and more talk about the functions of a CEO and how the role is different from others.