1. Taco Bell has focused on the millennial market in the last decade through highly active social media campaigns across platforms like Twitter, Snapchat, and Instagram. 2. They have figured out how to engage youth audiences through clever, comical content while building their brand. Their mobile app promotes ordering and paying ahead of time. 3. Notable social media campaigns include blacking out all accounts to promote their mobile app, garnering millions of downloads, and responding to customers in real-time across social platforms to build loyalty.