A smartphone is a mobile device that allows users to make phone calls and access computer-like features and apps. The document discusses how smartphones have increased productivity in workplaces by allowing users to access emails and do business on the go. Smartphones also provide easy access to social networking sites, news, sports and weather. They are portable study tools for students and some colleges have developed their own apps to support learning. While smartphones offer convenience with information at users' fingertips, they also have disadvantages like small screens, costs, and potential impacts on work-life balance.