In December 2018, Sarah Friar was named CEO of Nextdoor, the world’s largest private social network for neighborhoods. Prior to leading Nextdoor, she was CFO of Square and SVP of Finance & Strategy at Salesforce. She serves on the boards of Walmart and Slack, and is the co-founder of Ladies Who Launch, a nonprofit that celebrates and empowers women entrepreneurs. In this conversation with Stanford professor Tom Byers, she discusses what attracted her to Nextdoor, and explores how she aims to amplify helpful, neighborly behavior on a social network.