"Old-school" media, such as radio, faced a problem of losing potential clients and it had to pay much more attention to their audience and its needs. The role of ratings has increased sharply because of demand of study the auditory, its behavior and response... This paper aims to understand the principles and methods of construction and the formation of the ratings in radio; their use in radio work and their importance not only for effective distribution of advertisements, but also for the formation of the internal workings of radio stations..."