The marketing world is buzzing about Snapchat’s filing for an IPO and launch of Spectacles (basically everything Google Glass wasn’t). Yet the very mention of Snapchat still has many marketers scratching their heads. Meanwhile, tweens, teens and, you guessed it, millennials are snapping their little hearts out. It seems as if just when brands get the hang of a new digital platform, they are introduced to another – or at least a new function of