The modern market economy is characterized by the predominance of knowledge and information over material factors of production. Information technologies for market management of enterprises modify traditional marketing approaches. The monograph examines the multidimensional impact of the informatization of society on the sphere of market relations. The author offers a comprehensive view of the current stage of development of marketing as a type of information activity. A systematic approach to determining the essence and modern purpose of marketing information systems (MIS) has been implemented. The author's classification of marketing information as the basis for the formation and functioning of MIS has been developed. Methodological principles are formulated and the author's MIS model is developed based on marketing mix variables. Significant attention in the monograph is paid to information technology and software in the implementation of MIS. The monograph is recommended for use in the educational process in the training of specialists, bachelors, masters, graduate students and doctoral students in the field of marketing, organization and management of the innovative economy, as well as in research work and practice of market activities.