Led Zeppelin was the definitive heavy metal band. It wasn’t just their crushingly loud interpretation of the blues — it was how they incorporated mythology, mysticism, and a variety of other genres (most notably world music and British folk) — into their sound. Led Zeppelin had mystique. They rarely gave interviews, since the music press detested the band. Consequently, the only connection the audience had with the band was through the records and the concerts. More than any other band, Led Zeppelin established the concept of album-oriented rock, refusing to release popular songs from their albums as singles. In doing so, they established the dominant format for heavy metal, as well as the genre’s actual sound. Read more on allmusic.com
Led Zeppelin were an English rock band, active in the late 1960s and throughout the 1970s. Formed as the New Yardbirds in 1968, the band consisted of guitarist Jimmy Page, singer Robert Plant, bassist/keyboardist John Paul Jones, and drummer John Bonham. They are widely considered to be one of the most successful, innovative and influential rock groups in the history of music.
After changing their name, the band signed a favourable deal with Atlantic Records that allowed them considerable artistic freedom. Led Zeppelin disliked the releasing of tracks as singles, preferring their albums to be viewed as indivisible, whole listening experiences, helping to promote the concept of album-orientated rock. Read more on wikipedia.org