It is indicated that today the role of the Internet with all the unlimited amount of digital content that is produced in its spaces every day is extremely difficult to overestimate. Nowadays, it is various social networks and other online platforms that have become not only a means of placing and distributing information, but also the main communication field, which over time has made a real revolution in the field of user interaction. The article is devoted to the issues of legal regulation on political advertising and election campaignd in social media and on other online platforms, aims to highlight the central problems, as well as to outline the spectrum of possible ways to solve such problems through the study of Ukrainian and international experience of working with the control of the information field, namely, in the part of campaigning activities of the relevant subjects in social media, on other online platforms during the election process. Special focus in the current study is made on the correlation of national and corporate regulation of issues related to the use of foreign online platforms services for posting information that is considered as political advertising. In addition, it outlines a range of problems that are currently outside the scope of legal regulation and are caused, on the one hand, by the rapid pace of digital technologies development, and on the other hand, by the nature and essence of such a phenomenon as election campaigns and political advertising means in general, namely in terms of a wide range of tools for influencing the audience. As a result, the need for cooperation between the state as a legislator and corporations as non-state entities that own and manage specific resources used for posting election campaign materials is emphasized. It was also concluded that there is a need to pay special attention to the improvement of the national legislative framework in terms of understanding political advertising as a social phenomenon and creating special requirements for the regulation of legal relations regarding such advertising placement in social media and other online platforms.