Push Notifications should not be used for promotions or direct marketing purposes unless customers have explicitly opted in to receive them via consent language displayed in your app’s UI, ...

In that way, push notifications may indeed be the smartphone’s defining feature. They are, if nothing else, a perfect avatar of how frustrating it can be to own one. About the Author.

As part of the Super Bowl marketing campaign, Duolingo sent out 4 million mobile push notifications when the company’s five-second ad aired during the commercial break. At QCon London, Doulingo ...