Динаміка змін громадської думки під впливом інформаційних кампаній в онлайн-медіа в умовах воєнного стану

The development of an information society contributes to the formation of online media, which affects public opinion. The article aims to study the specifics of public opinion change under the influence of information campaigns in online media under martial law. For this, methods of comparative analysis, calculations of the weighting factor, the advance coefficient, and the Mann-Whitney coefficient were used. The study found that 'HROMADSKE', 'Suspilne Movlennia', and 'ZN.UA' are the most popular online media in Ukraine, which contribute to the presentation of trustworthy and relevant information. The most spread world online media are 'Associated Press', and 'The New York Times', which reflect various themes, and promote the engagement of a larger number of readers. The most influential parameters affecting public opinion were found to be the filling with the content according to referring to a certain source. They also include information substantiation with relevant facts, daily information coverage, information analysis by competent individuals, information sharing by different sources, and forms of presenting information. Analysis of the influence of information campaigns showed that they contributed to the change of public opinion concerning the government (31%), and attitude to the government of other countries (25%). The practical value of the work lies in studying the factors positively affecting public opinion change, which may be considered in journalists training. Study perspectives may be related to the determination of the effect of informational opinion on the influence of citizens of different age groups.