Mark Stouse is the former CMO of a large enterprise organization and the current CEO of Proof Analytics, a software analytics company. Mark discusses the importance of being a data-driven CMO and how most CMOs do it wrong. He emphasizes that data is always about the past and not predictive of the future, making it crucial for marketers to focus on forecasting and understanding causality. He also shares insights from his interviews with CEOs and CFOs, highlighting their frustrations with marketing. He concludes by discussing the time lag in B2B marketing and the importance of using analytics to prove the value of marketing investments.