The document discusses the purposes and techniques used in music videos. It explains that music videos are primarily used to promote songs and artists in order to increase album sales and gain more fans. Common techniques used include telling a story through the lyrics, showing what the artist looks like, and including close-ups of the artist's face. Music videos also promote the record label and can feature collaborations between artists. They are often designed to be entertaining and go viral in order to reach larger audiences. However, some techniques like the "male gaze" and use of stereotypes can perpetuate negative portrayals.