This report, "Millennials: A Marketer's Manual" by GWI, provides insights on the characteristics and behaviors of millennials, a generation born between 1981 and 1996. The report is based on data from the GWI platform and covers topics such as their spending habits, media consumption, and social behavior. Key insights include that millennials are early adopters of technology and social media, and that their spending patterns are driven by their desire for experiences and self-expression. The report also highlights the importance of representation and inclusivity in marketing to millennials, as they are highly image-conscious and value brands that align with their values. Overall, the report provides valuable insights for marketers looking to understand and engage with this important demographic.