The term 'TOP 40 GENRE' refers to the popular music genre of POP, which is characterized by catchy melodies, simple chord progressions, and often includes synthesizers and drum machines. POP music has been around since the 1950s and has become one of the most popular genres in the world. It is often associated with mainstream radio stations and the Billboard Hot 100 chart, which ranks the top 40 songs in the United States.