…Once this list is completed, Billboard magazine sends the information out to the public worldwide. The Top 40 can be broken down into the Top 40 Mainstream, Rhythmic Top 40, Adult Top 40, and Top 40 Adult Recurrents.Musicians compete for a good spot on another very prestigious list: the Billboard 100. Like the Top 40, this list is America's industry accepted standard on what songs are popular, requested on the radio, and being purchased by music consumers. There's also have Billboard's Pop 100, which is another hot list of the most in demand pop songs in America. Keeping an eye on the Billboard charts is a great way to see what songs people like and what songs people aren't really into. It may come in handy when you're ready to throw a party and want to spin the hottest jams. Both the Top 40 and the Billboard 100 are important to music industry marketers as a way for artists and promoters to know where they stand with their targeted audience.