A "hook" is a literary device used to grab the reader's attention at the beginning of a story or article. It can take various forms, such as a surprising fact, a provocative question, or a vivid description. The purpose of a hook is to engage the audience and encourage them to continue reading. In music, a hook refers to a catchy musical phrase or lyric that makes a song memorable. It often appears in the chorus and is designed to stick in the listener's mind. Effective hooks can significantly contribute to a song's popularity and commercial success, making them a crucial element in the music industry.