Data Driven Marketing (DDM) involves making marketing decisions based on analysis of customer data. It is customer-centric and focuses on collecting data about customer transactions, behavior, and interactions to gain insights. DDM requires implementing marketing technology to automate processes, collecting and analyzing large amounts of customer data, and changing marketing teams and processes to be more data-driven. Fully implementing DDM is a long-term transformation that requires investments in systems, databases, teams, and new processes.