A "hook" is a literary device used to grab the reader's attention at the beginning of a story or article. It can be a surprising fact, a question, or a vivid image that piques curiosity and encourages further reading. The purpose of a hook is to engage the audience right away, making them want to learn more about the topic. In music, a hook refers to a catchy melody or phrase that makes a song memorable. It is often repeated throughout the track and is designed to stick in the listener's mind. A strong hook can significantly contribute to a song's popularity and commercial success, making it a crucial element in songwriting.