Youdao Inc develops and markets software applications. It engages in developing technologies to provide learning content, applications, and solutions. The firm operates in three segments:  Learning services, Smart devices, and Online marketing services. The majority of its revenue comes from the Learning services segment, which generates revenues from online courses, mainly including Youdao Premium Courses, NetEase Cloud Classroom, and China University MOOC. The learning products segment includes sales of smart devices such as the Youdao Dictionary Pen and Youdao Pocket Translator.