Music videos typically last 3-4 minutes and combine live performance with narrative or conceptual imagery to promote an artist's music and image. They tell stories, either related to or suggested by song lyrics, or develop symbolic or thematic concepts. Many include some combination of the artist performing, a narrative storyline, and visual elements to represent the song's meaning. The goal is to entertain audiences while advertising the artist's music and setting the tone for how the song should be interpreted.