Okay, so you know how sometimes you see ads on TV or on the internet? They're trying to get you to buy something or use a service. Well, sometimes those ads have music in them.
The music is there to help make the ad more interesting or exciting. It's like when you hear a song that you really like and it makes you feel happy or energetic. That's what the companies making the ad want you to feel too, so you'll think their product or service is really cool.
Sometimes they use music that's already really popular, like a song you might hear on the radio or in a movie. Other times, they make up their own music just for the ad.
But either way, the point of the music is to help you remember the product or service and make you want to use it. So next time you see an ad with music, remember that the people making it are trying to make you feel good about what they're selling!