technoguy

A music video (also promo) is a short film or video that accompanies a complete piece of music, most commonly a song. Modern music videos were primarily made and used as a marketing device intended to promote the sale of music recordings. Although the origins of music videos go back much further, they came into their own in the 1980s, when Music Television's format was based around them. In the 1980s, the term "rock video" was often used to describe this form of entertainment, although the term has fallen into disuse.

technt77

I think that music videos are a powerful marketing tool. I for one might not purchase a song (off iTunes) based on the song alone, but when I see a solid video with it, listening to the song reminds me of the video, and that makes listening to it that much more enjoyable.