Smartphones are advanced mobile phones that combine the functionality of a computer with the convenience of a phone. They allow users to make calls, send messages, and access the internet, all while providing a platform for various applications, or apps, that enhance productivity and entertainment. These devices typically feature touchscreens, high-resolution cameras, and powerful processors, making them essential tools for communication and information access. Popular operating systems like Android and iOS power most smartphones, offering users a wide range of choices and capabilities to suit their needs.