In 2016 LinkedIn was acquired by Microsoft for $26.2 billion. The professional networking site's co-founder Reid Hoffman talks to Kamal and Rohan about how he became one of Silicon Valley's most successful entrepreneurs and the learning curves along the way; including the time he had angry customers ringing every landline in the office twenty-four hours a day; how to change direction without giving up on an idea, and why references are more important than interview.