Snapchat's Ads are effective. More effective than anything else on the internet or other apps. They are authentic, entertaining, in-context and brief. They follow the 3Vs: Vertical (Made for Mobiles) / Video (Great Way to Tell Story) / Viewing (Always Full Screen).
Snapchat's average monthly use per visitor is way above other social networks for the younger generation. And it is growing incredibly fast.
Advertisers are able to integrate deeply into the app in various unique and interesting ways.
Snap chat is the leader a new wave of advertising, in the way Facebook did a few years ago, and google before that.