Starbucks Coffee Korea said that it has received more than 20 million customer orders via its Siren Order application. Its online-to-offline (O2O) app service was launched in Korea in May 2014, enabli…
Starbucks Coffee Korea said that it has received more than 20 million customer orders via its Siren Order application. Its online-to-offline (O2O) app service was launched in Korea in May 2014, enabli…