At the beginning of the 21th century multitudes of economic, political and cultural mutation have been observed. These transformations are due to the recent audiovisual reforms concerning the multiplication of private platforms (TV and Radios) and the instauration of the higher quality of programs. Our reflexion focused on the facts which have lead some private radios to base their marketing and communication strategy on the digital social Medias (DSM) to promote their editorial line and radio programs.