Millennials are a large and influential generation that marketers want to target but have often struggled to engage effectively. To appeal to millennials, marketing must be personalized, value-driven, and delivered through their preferred mobile and social media channels. Millennials spend most of their online time on their phones and rely heavily on them, so marketing content should be optimized for mobile viewing. Personalized social media campaigns, videos, and product placements are effective ways to reach millennials where they already engage online.