If a written script is required, they may do the research and writing. Announcers also interview guests and moderate panels or discussions. Some provide commentary for the audience during sporting events, parades, and other events. Announcers are often well known to radio and television audiences and may make promotional appearances and remote broadcasts for their stations. Radio announcers are often called disc jockeys .
Some disc jockeys specialize in one kind of music.
They announce music selections and may decide what music to play. While on the air, they comment on the music, weather, and traffic. They may take requests from listeners, interview guests, and manage listener contests. Newscasters or anchors work at large stations and specialize in news, sports, or weather. Show hosts may specialize in a certain area of interest such as politics, personal finance, sports, or health.