Considering 42% of Hispanic Millennials and 25% of African-American Millennials access the internet only on their mobile devices, compared to just 10% of the total population, understanding where and how to market on mobile is vital. But as brands strive to put out more personalized content and marketing, the mobile space is presenting itself as a challenge. Tracking systems—what brands are using to understand consumers’ preferences and habits—don’t work as well on mobile. To make up for it, brands are turning to Facebook, which picks up on users’ language, streaming music sites like Pandora and iHeartRadio, and multicultural specific publishers. (AdAge)