4 Big Developments That Show Why Snapchat Was 2015's Buzziest Platform

From vertical video to sponsored selfies

When Snapchat's CEO Evan Spiegel took the main stage at this year's Cannes Lions International Festival of Creativity, the crème de la crème of advertising conferences, his company's prominent place in the marketing world seemed solidified. But that was only one of the big moments in 2015 that suggested his mobile app—with millions of teens and college kids who use it constantly—would become a mainstay for brands.