Globalized content platforms such as Facebook and Twitter have been deeply involved in people’s various public activities, including news production and dissemination, civic education, and transportation. With the growth of these platforms, what responsibilities they should undertake for the content shared on them has become the focus of debate and research among scholars. This research essay argues that cooperative, legal, and corporate social responsibilities are the three major responsibilities that globalized content platforms are encouraged to undertake. On the basis of taking cooperative responsibility, globalized content platforms are obliged to refine their legal and corporate social responsibilities according to the laws, policies, and situations of various countries to deal with government regulation. In addition, platforms are expected to establish a dynamic responsibility adjustment mechanism to keep up with new regulations and changes in national conditions, so as to play the role of the gatekeeper to the Internet.