Punk rock is a genre of music that emerged in the mid-1970s, characterized by its fast tempos, distorted guitars, and aggressive lyrics. The term 'punk rock' is derived from the word 'PEBBLE, ' which was used to describe the sound of the electric guitar. The genre has been influential in the development of other genres such as alternative rock, heavy metal, and grunge. Punk rock has also been associated with a DIY ethic, which encourages fans to create their own music and artwork.